TV-Series
Description
Miyu Kouzuki, a high school student, is forced to move in with her family friend, the priest Kanata Saionji, after her parents relocate to the United States for work. Initially, Miyu struggles to adjust to her new life, feeling out of place in the unfamiliar household. Her situation becomes even more complicated when Kanata’s nephew, Yuuya Sakurai, arrives from America to live with them. Yuuya, a carefree and somewhat mischievous boy, quickly becomes a source of both annoyance and companionship for Miyu.
The household dynamic takes an unexpected turn when a small alien baby named Ruu and his pet-like companion, Wanya, crash-land on Earth and are discovered by Miyu and Yuuya. Ruu, who possesses advanced alien technology, is unable to return to his home planet immediately, and the trio decides to care for him in secret. The series explores the challenges and humorous situations that arise as Miyu and Yuuya navigate their new responsibilities as caretakers for Ruu while keeping his existence hidden from others.
As the story progresses, Miyu and Yuuya grow closer, developing a bond that evolves from initial friction to mutual understanding and affection. Their relationship is tested by various obstacles, including misunderstandings, rivalries, and the occasional interference of Ruu’s alien technology. Supporting characters, such as Miyu’s classmates and Kanata, add depth to the narrative, often contributing to the comedic and heartfelt moments that define the series.
Themes of family, responsibility, and growing up are central to the story, as Miyu and Yuuya learn to balance their personal lives with their unexpected roles as guardians. The series blends slice-of-life elements with light science fiction, creating a unique tone that balances humor, drama, and occasional moments of tension. The episodic nature of the story allows for a variety of scenarios, from everyday school life to more fantastical adventures involving Ruu’s alien origins.
Throughout the series, the characters’ growth is evident, particularly in Miyu and Yuuya’s evolving relationship and their increasing maturity as they face challenges together. The narrative maintains a lighthearted and optimistic tone, with a focus on the bonds formed between the characters and the joy of discovering new experiences. The series concludes with a sense of closure, resolving key character arcs while leaving room for the characters’ continued growth and adventures.
The household dynamic takes an unexpected turn when a small alien baby named Ruu and his pet-like companion, Wanya, crash-land on Earth and are discovered by Miyu and Yuuya. Ruu, who possesses advanced alien technology, is unable to return to his home planet immediately, and the trio decides to care for him in secret. The series explores the challenges and humorous situations that arise as Miyu and Yuuya navigate their new responsibilities as caretakers for Ruu while keeping his existence hidden from others.
As the story progresses, Miyu and Yuuya grow closer, developing a bond that evolves from initial friction to mutual understanding and affection. Their relationship is tested by various obstacles, including misunderstandings, rivalries, and the occasional interference of Ruu’s alien technology. Supporting characters, such as Miyu’s classmates and Kanata, add depth to the narrative, often contributing to the comedic and heartfelt moments that define the series.
Themes of family, responsibility, and growing up are central to the story, as Miyu and Yuuya learn to balance their personal lives with their unexpected roles as guardians. The series blends slice-of-life elements with light science fiction, creating a unique tone that balances humor, drama, and occasional moments of tension. The episodic nature of the story allows for a variety of scenarios, from everyday school life to more fantastical adventures involving Ruu’s alien origins.
Throughout the series, the characters’ growth is evident, particularly in Miyu and Yuuya’s evolving relationship and their increasing maturity as they face challenges together. The narrative maintains a lighthearted and optimistic tone, with a focus on the bonds formed between the characters and the joy of discovering new experiences. The series concludes with a sense of closure, resolving key character arcs while leaving room for the characters’ continued growth and adventures.
Episodes
Staffel 1
1Suddenly 4 People in the Family?!
Miyu Kōzuki arrives at the Saionji family temple after her parents leave for NASA in the United States. The temple’s monk,Hoshou Saionji, greets her along with his teenage son, Kanata. Before Miyu can settle in, Hoshou departs for religious training in India, leaving the two teenagers alone in the large temple. That same night, a small UFO crashes into the building. From it emerge Ruu, an alien infant, and Wanya, a shape-shifting creature who serves as Ruu’s babysitter. Wanya explains that a sudden wormhole brought them to Earth and they have no means to return immediately. Ruu begins calling Miyu “Mama” and Kanata “Papa,” further complicating the situation. An awkward encounter occurs when Kanata accidentally sees Miyu in the shower, and Miyu later walks in on Kanata while he changes clothes. With no adults present and nowhere else for the aliens to go, the four agree to live together under one roof. Wanya uses its shape-shifting ability to disguise itself while helping care for Ruu, and everyone must now keep the aliens’ presence a secret from the outside world. The unexpected arrival forces Miyu and Kanata into an improvised family arrangement filled with constant adjustments.
2Ruu-kun Is Climbing the Chimney
Miyu attends her first day at a new school and learns Kanata serves as class president with a devoted fan club. She meets Christine Hanakomachi,a half-French classmate who openly admires Kanata. During class, Miyu spots Ruu floating outside the window and Kanata notices her distress. They both leave the classroom to chase the alien baby before anyone else sees him. Ruu leads them on a pursuit through the town and climbs onto a rooftop chimney. Kanata climbs up first to retrieve Ruu, and Miyu follows him onto the roof. Ruu continues moving higher up the chimney, forcing Kanata to climb after him while Miyu watches from below. Kanata finally catches Ruu, but they become stuck on the roof together. The commotion attracts attention from people in the street, increasing the risk of exposing Ruu's existence. After they manage to descend, Kanata and Miyu return home, now more aware of the difficulty in keeping Ruu hidden while managing their daily school lives. The episode establishes Christine as a recurring presence who will continue to observe Kanata and Miyu's interactions.
3Chris and Her Friends Drop By
Miyu and Kanata wake up to find Ruu and Wanya missing. They search the temple and discover both on the roof,where Wanya has been attempting to contact Planet Otto with a borrowed antenna. A group of worshippers arrives, forcing Miyu to perform gymnastics to divert their attention while Kanata retrieves the alien pair. Wanya reports that his 125 connection attempts have failed, and Kanata warns him to be more cautious. Ruu begins floating through the hallway, and while Miyu and Kanata try to contain the situation, Mikan Yamamura, a manga artist and family acquaintance, arrives unexpectedly. Miyu introduces herself as Kanata’s cousin to explain her presence, and the two scramble to keep Mikan from discovering Ruu and Wanya. Mikan reveals she already knows Kanata’s father entrusted the house to them before leaving for India and had pretended ignorance to observe their living situation. After Mikan departs, Miyu and Kanata return inside to find objects floating again. The doorbell rings, and Miyu opens the door to find Chris and several members of Kanata’s fan club standing outside. Chris rings the bell repeatedly while Miyu attempts to keep the group occupied outside the temple. As the fan club girls ring the temple bell, Chris questions Miyu about living together with Kanata.
4Momoka and the Necklace
Miyu prepares to go out with her friends but discovers her necklace is missing. A crow snatches the piece of jewelry from her room and flies away with it. Three-year-old Momoka,who is Christine's younger sister, chases the crow on her tricycle and recovers the necklace. Meanwhile, Wanya loses track of Ruu while shopping for dinner ingredients. Ruu wanders off and encounters Momoka, who is now holding the necklace. The two young children spend time together as Kanata and Miyu separately search the town. Their search ends when they spot Momoka and Ruu together. After the group reunites, Momoka declares Ruu to be her boyfriend, creating a new and unexpected dynamic. This declaration adds a layer of youthful affection to the existing secret the teenagers keep about the alien baby. The episode establishes a recurring connection between Ruu and the neighborhood girl Momoka, complicating efforts to keep Ruu's presence hidden.
5Miyu's Awful Cuisine
Miyu wins two tickets to the newly opened Momoland amusement park in a raffle. Wanya,the alien babysitter, guilt-trips Miyu by listing his daily household chores, making her feel she owes him. Miyu offers the tickets to Wanya, who then disguises himself as a young man and takes Ruu to Momoland. The departure leaves Miyu and Kanata alone in the Saionji house for the first time. Miyu grows visibly nervous and self-conscious about being alone with Kanata. They go to the grocery store together to buy ingredients for dinner. When Miyu presses Kanata to state a food preference, he admits he likes pumpkin. Miyu insists on cooking a pumpkin dish for him despite having no prior experience. They return home and prepare the meal together, collaborating in the kitchen. After dinner, a person wearing an astronaut suit arrives at the house. The astronaut removes her helmet and reveals herself to be Miyu’s mother, who had been working at NASA in the United States.
7Ruu-kun - Popular at School
Miyu packs her belongings for cooking class. Ruu jumps into her bag without her noticing. During the cooking class,Miyu discovers Ruu hiding inside her bag. She attempts to conceal him from her classmates and teacher. Ruu's presence becomes impossible to hide as he moves and attracts attention. The other students notice Ruu and immediately adore him. Miyu fails to keep Ruu a secret during the class. Aya observes the situation and develops an idea for the upcoming drama competition. She proposes a play that features Kanata, Miyu, and Ruu as the main characters. The episode establishes Ruu's growing visibility outside the Saionji household. Miyu faces the challenge of controlling Ruu's actions in a public school setting. The drama competition plan sets up new complications for hiding Ruu's alien origins.
8Ruu-kun's Acting Debut
Miyu and Kanata participate with Ruu in a school drama competition. The class chooses to perform a play titled "The Lady of the Moon," and the director assigns Miyu the lead role. Miyu struggles to memorize her lines during rehearsals, frequently making mistakes that frustrate her classmates. Kanata and Ruu watch from the sidelines as Miyu grows increasingly anxious about the upcoming performance. On the day of the competition, Miyu initially performs her role without error, delivering her lines with confidence. At the play's climax, Miyu trips on stage, threatening to ruin the final scene. Ruu, sitting in the audience, uses his psychic powers to levitate everyone on stage, successfully completing the scene as if Miyu had ascended to the Lady of the Moon. The audience applauds the seamless save, unaware of Ruu's intervention. After the performance, Miyu expresses relief and gratitude toward Ruu for his help. Kanata observes that relying on Ruu's powers to solve problems creates a precarious situation for their household. The episode ends with the trio returning home, aware that they narrowly avoided revealing Ruu's alien abilities to the public.
9A Date in the Park Between Cousins
Ruu and Momoka go on a date in the park,with Miyu and Kanata following them as chaperones. Momoka herself brings an additional chaperone, her cousin Chris, whom the others meet for the first time. During the outing, Wanya arrives carrying a toy called the "mini mini setto," which arrived as a delivery from the planet Chuuhan. The toy activates and shrinks Miyu, Kanata, and Chris down to a tiny size. The three miniature characters struggle to reach and press the button that will return them to normal. Chris becomes angry when she sees Miyu and Kanata touching hands while they try to work together. Her anger provides the final push needed for them to successfully hit the button and reverse the shrinking effect. After returning to normal size, Miyu and Kanata convince Chris that the entire shrinking incident was only a dream. The episode ends with Chris accepting this explanation, leaving Miyu and Kanata as the only ones who remember what truly happened.
10Episode 10
Miyu and Kanata attempt to maintain their usual routines while managing the chaotic presence of the alien baby Ruu and his babysitter pet,Wanya. The household falls into disarray when Wanya, also called Santa, becomes overly energetic and disrupts daily life. His erratic behavior leads to objects floating and moving around the Saionji temple without control. Miyu struggles to keep the situation hidden from neighbors and classmates who might notice the strange occurrences. Kanata works alongside her to contain the alien pet's outbursts before they expose their secret arrangement. The disruptions escalate until Wanya's antics threaten to damage a precious item within the temple. Ruu's emotional reactions further complicate the situation, as the baby alien responds strongly to the chaos. Miyu and Kanata must cooperate closely to calm both Ruu and Wanya while preventing outside attention. Their efforts to resolve the crisis reveal the growing necessity of trust between them as makeshift guardians. The immediate threat subsides only after they devise a way to redirect Wanya's energy safely. The episode concludes with the temporary restoration of order, yet the constant risk of exposure remains a looming challenge for the pair.
13The Mysterious Planet Sharaku
Yaboshi,a new visitor, arrives at the Saionji household and introduces himself to Miyu and Kanata. He reveals his identity as an alien from the planet Sharaku. Yaboshi announces his intention to take Ruu and Wanya back to Sharaku for a three-day visit. Before departing, he uses his power to render Miyu and Kanata unconscious. Upon waking, the two discover that the three days on Sharaku equate to half a year on Earth. Realizing the prolonged separation this would cause, they desperately try to intervene. Inside the UFO, Ruu senses the distress of his adoptive parents and becomes angry. Ruu uses his psychic powers, causing significant damage to the UFO. The damaged spacecraft loses control and crashes into a mountain. Miyu, Kanata, and the others hear the news of the crash and immediately rush to the mountain to find Ruu and Wanya. The immediate threat shifts from a long-distance separation to a dangerous rescue operation.
14Help! Transforming Wanya
Wanya loses control over his transformation ability because he has not used the required sitter-pet shampoo. He begins turning into random objects and creatures without warning. Miyu and Kanata search the house for Wanya but repeatedly miss encountering him. Ruu,the alien baby, eventually locates Wanya on his own. Ruu administers the special shampoo to Wanya, washing him thoroughly. The shampoo treatment restores Wanya's ability to control his transformations. The household returns to a calmer state after the disruption. The incident highlights Ruu's growing initiative in caring for his pet. The group resumes their daily life while continuing to hide Ruu and Wanya's extraterrestrial origins. The secret of their presence on Earth remains a persistent challenge for Miyu and Kanata.
15Mikan Ran Away - Saionji!
Mikan Saionji comes to the Saionji residence carrying her drawing materials. She tells Miyu and Kanata that a new chief editor at her manga publishing company has been harassing her. The editor constantly criticizes her work and threatens to cancel her series. Mikan fears she cannot meet her upcoming deadline because of the editor's interference. She sits down at a table and begins drawing to complete her manuscript pages. While reaching for another tool,her elbow knocks over an open ink bottle. Black ink spreads across several of her finished drawings, ruining them. Mikan stares at the damaged pages in despair. Miyu rushes over with cloths to soak up the excess ink. Kanata examines the ruined pages and suggests they can redraw the damaged sections. Miyu agrees to help by tracing the original lines. Kanata fills in the solid black areas and background details. The three of them work through the evening and into the night. Miyu carefully copies Mikan's character designs onto fresh paper. Kanata uses his steady hand to redraw the panel borders and sound effects. Mikan focuses on the most complex illustrations that require her personal style. By early morning, they complete the entire set of manuscript pages. Mikan thanks Miyu and Kanata for saving her from missing her deadline. She packs her materials and leaves the Saionji house to deliver the manga to her editor. The episode closes with Mikan walking away, uncertain whether the chief editor will accept the finished pages or continue his harassment.
16Ocean and the Lovers' Tree
The group travels to the beach for a summer outing. Mikan discovers a large tree called the Lovers' Tree. She explains the legend that any couple who kisses under the tree on the night of a lunar eclipse will remain together forever. A lunar eclipse is scheduled to occur that same evening. Mikan develops romantic feelings for Wanya after he transforms into his human-like form. She attempts to confess her feelings to Wanya. Chris interrupts the confession before Mikan can finish speaking. Chris later lifts the Lovers' Tree,causing it to nearly fall onto Miyu. Kanata pushes Miyu out of the path of the falling tree. During the rescue, Miyu accidentally lands a kiss on Kanata's cheek. The accidental kiss happens directly under the Lovers' Tree while the lunar eclipse takes place. Miyu and Kanata walk away awkwardly, both aware that the legend may now apply to them.
19The Mysterious Home is Miyu's Real House?
Miyu receives a letter from her parents asking her to visit her family home to check on it. Kanata,Santa, Chris, Ruu, Aya, Nanami, and Wanya in disguise accompany her despite her protests about the state of the house. Upon arrival, the group finds the house not dirty but immaculately clean, which unnerves them. Unsure how to proceed, they discover a pile of junk in the backyard and begin sorting through it. Santa becomes excited over an old camera, and Miyu recognizes a plate her family brought back from a vacation. As they bring the items back inside, Kanata and Miyu discover the culprit behind the excessive tidiness: an alien named Souji from the planet Osouji, who has a compulsive need to clean. Miyu explains to Souji that the objects he discarded hold personal value to her family. Souji repairs a crack in the plate and joins the group in lighting sparklers in the backyard. The group returns the house to a lived-in state, and Souji departs after understanding the importance of sentimental possessions.
25With Ruu-kun at the Department Store
Miyu and Kanata take Ruu to a department store for a day out. Ruu becomes excited by the crowds and the various sights inside the building. A disagreement arises between Miyu and Kanata over which items to buy. Their argument escalates,causing tension between the two guardians. Ruu senses the conflict and becomes visibly upset. He uses his psychic abilities to subtly bring the two together. His powers push Miyu and Kanata into close proximity, forcing them to interact. The couple realizes Ruu's intervention and understands his distress. They reconcile to calm the baby, putting aside their dispute. The event highlights Ruu's deep emotional connection to both Miyu and Kanata. The episode concludes with the family leaving the store, their bond strengthened by the shared experience. The ongoing challenge of maintaining a peaceful household around Ruu’s sensitive nature remains.
27A Correspondence with Ruu's Parents
A communication device activates in the Saionji house,carrying a message from Ruu's home planet. The alien baby responds to the signal with excitement, recognizing the energy signature as belonging to his parents. Miyu and Kanata watch as the device projects faint images and sounds, allowing Ruu to see and hear his family for the first time since his arrival. Ruu's parents explain through the transmission that they cannot retrieve him immediately due to ongoing issues on their world. The message conveys their love and reassures Ruu that they are working to bring him home. Ruu reaches toward the projection, attempting to touch the images of his mother and father. After the transmission ends, Ruu becomes quiet and clings to Miyu, showing his longing for his absent family. Kanata observes Ruu's distress and suggests they find a way to send a reply back to the planet. Miyu agrees and they begin searching for a method to record a response message for Ruu's parents. The episode closes with the group preparing to send Ruu's own words and images across space, uncertain if their attempt will succeed.
31Episode 31
Miyu and Kanata take Ruu to a summer festival,where the alien baby becomes fascinated by the goldfish scooping stalls. Wannya warns them that Ruu's excitement could trigger his psychic powers, potentially causing a commotion. Despite their efforts to keep him calm, Ruu floats into the air when he sees the goldfish, drawing unwanted attention from the crowd. Kanata catches him before anyone notices anything unusual, but the close call forces them to retreat to a quieter area. Seeking a distraction, Miyu buys Ruu a balloon, which he accidentally releases into the night sky. The balloon drifts toward a group of children who mistake it for a UFO, creating a new wave of panic among festival-goers. Kanata retrieves the balloon while Miyu apologizes to the distressed parents. The group decides to leave the festival early to prevent further incidents, with Ruu sleeping peacefully in Miyu's arms on the walk home. The episode highlights the ongoing challenge of hiding Ruu's alien nature during ordinary public outings. The next morning, a television news report covers the festival, showing footage of the balloon and reigniting local rumors about UFO sightings.
33Kanata's Childhood Friend
A girl named Akane arrives at the Saionji temple,introducing herself as Kanata's childhood friend. She greets Kanata with warm familiarity and quickly notices Miyu living in the same house. Akane scrutinizes Miyu, asking pointed questions about her relationship with Kanata. Kanata explains that his father left him in charge of the temple, but he avoids clarifying the situation with Ruu and Wanya. Akane decides to stay overnight, forcing Kanata and Miyu to keep Ruu's presence hidden. Throughout the evening, Akane recounts stories of her childhood with Kanata, subtly emphasizing their long history together. She displays clear romantic interest in Kanata and treats Miyu as an outsider intruding on their bond. Miyu grows increasingly uncomfortable but does not confront Akane directly. Wanya accidentally floats into the hallway, nearly exposing the secret before Kanata catches him. Later, Ruu begins crying loudly, and Kanata rushes to calm him, claiming the noise came from a television. Akane grows suspicious of their strange behavior and the locked room they keep guarding. Before leaving the next morning, Akane tells Miyu she will return, making her intentions to pursue Kanata explicit. Miyu watches Akane leave, realizing the threat this childhood friend poses to her own unspoken feelings. The episode ends with Miyu silently acknowledging that she must now compete for Kanata's attention.
37Miyu's Idol Debut
Miyu appears on a television broadcast,and the following day at school, classmates surround her asking for autographs. A large volume of fan mail arrives at her home. A production company contacts Miyu with an offer to become a regular reporter on a Kids News program. Miyu attends a camera test for the role but becomes visibly nervous during the filming. The experience makes her reflect on her daily life. She realizes that caring for Ruu and spending time with him brings her genuine happiness. Miyu concludes that pursuing an entertainment career would take time away from raising the baby. She formally turns down the television offer. Kanata arrives at the studio intending to escort her home, but he finds her decision already made. The two return to the Saionji residence together.
41Kanata and Nozomu's Showdown
Hikarigaoka challenges Kanata to the bishōnen contest,aiming to dethrone the previous year’s winner. Hikarigaoka examines Kanata’s official contest photo and deems it unflattering. He attempts multiple times to capture a better photograph of Kanata but fails to obtain a usable image. While walking home, Hikarigaoka spots Mikan wandering the streets in search of creative inspiration. He snaps a picture that appears to show Kanata pushing Mikan to the ground. Hikarigaoka submits this compromising photograph to the contest organizers. The image circulates among voters, and many withdraw their support for Kanata. Miyu steps in and explains to the female voters that the photograph captured a misunderstanding, not an act of aggression. The voters reconsider, and Kanata wins the contest for the second consecutive year. The victory solidifies Kanata’s standing, but Hikarigaoka’s tactics set the stage for future rivalry between the two.
42Episode 42
Wannya returns to the Saionji household,claiming he requires temporary shelter. His arrival disrupts the already delicate living arrangement between Kanata, Miyu, and Ruu. Wannya’s presence creates new tension as he immediately clashes with Ruu over territory, leading to a chaotic chase through the house. Kanata and Miyu struggle to mediate, attempting to establish ground rules to prevent further damage. Wannya reveals he is on the run from an alien organization seeking to reclaim a classified device he accidentally ingested. This revelation forces the group to hide Wannya while a pair of alien enforcers arrive on Earth. The enforcers disguise themselves as ordinary humans and begin canvassing the neighborhood. Kanata devises a plan to conceal Wannya’s alien energy signature using a dampening field generated by the family’s washing machine. The plan works temporarily, but the enforcers grow suspicious of the household’s occupants. During the close call, Ruu inadvertently lets slip a strange noise, drawing direct attention to the house. The enforcers demand entry, forcing Kanata and Miyu into a desperate improvisation to protect their secret. The episode concludes with the enforcers standing at the threshold, leaving the safety of the group uncertain.
44School Festival! Photo Contest Ruckus!!
The episode centers on the school cultural festival. Kanata and her classmates prepare a cafe exhibit for their class. Wannya wanders off and becomes fascinated by a photography club’s contest display. The club president announces a special prize for the best photograph featuring a baby. Wannya decides to enter the contest to win the prize for Ruu. He uses his powers to secretly take a photograph of Santa and Ruu sleeping together. The club president discovers the photograph and,impressed by its quality, sets it as the main entry. This forces Kanata and Santa to enter the festival to retrieve the picture without revealing Ruu’s existence. Santa disguises himself to blend in with the crowd and tries to steal the photo. The club president catches him and a chase ensues through the festival grounds. Kanata creates a diversion by causing a small accident near the display. Santa retrieves the photograph and they escape, but the president pursues them outside the school. Upon confronting them, she reveals she only wanted to know the identity of the photographer because of the photo’s emotional depth. Wannya appears and admits to taking it, accepting a small consolation prize instead of the main trophy. The group returns home, but the peace is broken when Ruu begins to glow, signaling an unexpected return of his parents from space.
47Miyu And Mini-Miyu Go To School
Ruu activates the Mini-mini Machine and shrinks Miyu to a tiny size. The machine’s batteries run out,and replacement batteries have not yet arrived. Wanya disguises himself and takes Miyu’s place at school to maintain her attendance record. The class sees the shrunken real Miyu, forcing the group to invent a cover story. They tell their classmates the tiny Miyu is a NASA-made robot. The deception momentarily convinces the other students and resolves the immediate suspicion. A crow then flies through an open window and grabs the miniature Miyu. The bird carries Miyu away from the classroom and out into the open air. The others watch helplessly as Miyu disappears from sight. Wanya and the remaining characters must now find a way to track the crow and retrieve Miyu before she is lost or harmed.
51Mikan-san no Nazo na Yakusoku
Miyu and Kanata discover that Mikan made a promise twenty years prior to meet a childhood friend at a plaza. Mikan spends the episode searching for him across various locations. When she finally reunites with the friend,they both admit they do not want to marry yet. The revelation of the promise explains the urgency behind Mikan's recent actions. Her search brings her into direct conflict with her own expectations versus the reality of time passing. The meeting forces both characters to acknowledge how their lives have changed since childhood. The mutual decision to delay marriage removes the immediate pressure from the promise. This resolution allows Mikan to move forward without the weight of an obligation from the past. The episode uses the promise to highlight how childhood commitments often shift with adult circumstances. The reunion does not result in a romantic conclusion, leaving the relationship between Mikan and her friend undefined. The closing moments show Mikan returning to her daily life with a lighter heart, having closed an old chapter.
55The Weird Object That Seiya Left Behind
Seiya returns to the Saionji temple and leaves behind a strange object that had been floating in outer space. Wannya reveals the object is a pet Daruma from Seiya's home planet. Seiya had purposely left the creature behind. The Daruma functions as a recording device with a memory card that stores everything it sees and hears. Miyu and Kanata realize the pet had been present when they each confessed their true feelings to one another. Kanata grabs the memory card and tries to erase the recording to prevent Miyu from hearing his honest sentiments. The struggle to retrieve the card escalates as both fear the embarrassment of their private words being exposed. The Daruma itself remains oblivious to the tension it causes,continuing its cheerful behavior around the household. The memory card becomes a physical representation of the unspoken emotions between Miyu and Kanata. Their efforts to destroy the recording fail as the card proves durable and the pet refuses to cooperate. With the card still intact, the threat of their true feelings being revealed hangs over both of them.
57Episode 57
Miyu and Kanata discover Ruu has developed a fever. Unable to use Earth medicine due to Ruu’s alien physiology,they contact Wannya for advice. Wannya explains that Ruu is undergoing a natural growth phase common to his species. The process requires Ruu to enter a cocoon-like state, during which he will be immobile and vulnerable. Miyu and Kanata set up a quiet space in the house for Ruu’s cocoon. Kanata worries about the potential dangers, while Miyu focuses on keeping Ruu comfortable and maintaining a normal environment. Ruu remains inside the cocoon for an extended period, forcing the two to wait without knowing the outcome. The waiting creates tension between Miyu and Kanata as they each handle the uncertainty differently. Kanata tries to distract himself with other tasks but keeps checking on the cocoon. Miyu sits beside Ruu, talking to him despite receiving no response. The cocoon finally begins to glow and crack open, revealing Ruu who appears slightly older. Wannya confirms the transformation succeeded and Ruu has grown. The household returns to its unusual rhythm, but Kanata reflects on the implications of Ruu’s continued development and what it means for his eventual return to his home planet.
63Scary Mountain Villa - Is Someone in Here?
The group of friends arrives at a mountain villa intended for their stay. They find a room with a fireplace and settle in for the time being. One by one,the friends go to the bathroom and do not return. Miyu and Kanata go looking for them and fall through a pipe into a lower area. They discover everyone else gathered there with a boy who had been studying in a room. Chris-chan reveals that the villa belongs to her family, though it has been unused for a long time. Shikada-san then arrives and announces that he made a typo, and this is the wrong lodge. The group relocates to the correct lodge, Deer Horn lodge. Wanya, Miyu, and Kanata later realize that the boy they encountered is an alien. Their discovery introduces the presence of another extraterrestrial being without revealing his intentions.
64Pen-Friend Comes
Santa’s friends notice his unusual distraction and mumbling,which culminates in Kanata pulling him from the path of an oncoming truck. When Kanata asks about his behavior, Santa explains he has exchanged letters for years with a pen friend named Akane who lives in Germany, and her impending visit has made him intensely anxious. Santa asks Kanata to stay at his house overnight for moral support before Akane’s arrival. The next morning, Santa repeatedly rushes to the door at every ring, only to find someone other than Akane. His anxiety peaks, and he dashes out to a record shop, with Kanata chasing after him to stop him. During Santa’s absence, Akane arrives, then proceeds to the Saionji temple where she encounters Miyu, Momoka, and a transformed Wanya. Before Miyu can inform Kanata, Akane leaves with Momoka and heads toward Heio Machi station. Santa arrives at the station, where Akane recognizes him by the distinctive record he carries. The two share a brief but pleasant conversation before she departs. Following her return to Germany, they resume their regular correspondence, maintaining the same relationship as before.
65Episode 65
One morning,Miyu and Wanya enter the kitchen to discover that numerous utensils and instruments have vanished overnight. They later find Kanata, Santa, and Nozumo gathered at the temple, constructing a strange machine. The three boys explain that they are building a pumpkin-themed device for an upcoming competition. Ruu and Wanya grow curious and join the boys in their workshop, leaving Miyu and the other girls behind. As the boys and Ruu spend their days working, Miyu experiences prolonged solitude and feels increasingly isolated from the group. On the day of the competition, the Waru Waru suddenly appear and kidnap Ruu, causing Kanata to panic. Kristine takes decisive action and successfully rescues Ruu from the captors. After the crisis resolves, Kanata approaches Miyu and formally apologizes for leaving her alone during the previous days. With the competition disrupted and tensions between the household members brought into the open, the group must reconcile their separate pursuits with their shared responsibilities.
68ワンニャー対鹿田さん
Chris searches for a gift to give Kanata but struggles to decide what he would like. Shikada-san goes to the Saionji temple to learn about Kanata's preferences. At the temple,Shikada-san witnesses Wannya transform from his alien form. To maintain the secret of Ruu and Wannya's origins, Wannya pretends to be a robot. Wannya grows jealous of the attention Shikada-san receives during his visit. A crow attacks Ruu and the alien pet Pepo. Wannya intervenes and saves them from the crow. Later, Shikada-san and Kanata find themselves in danger of drowning. Wannya again acts to rescue both of them from the water. Through these rescues, Wannya demonstrates his capabilities beyond his robot disguise. Shikada-san leaves the temple with a different impression of the household's unusual pet.
71It Is Auspicious with the Seven Deities of Good
Miyu,Kanata, and Wanya prepare a New Year’s dinner at the Saionji temple when the doorbell rings. Kanata’s father arrives and strikes the temple bell outside. Upon returning inside, the group discovers one of the seven lucky gods eating their prepared food. After a visit to the shrine, five more lucky gods suddenly appear on the temple grounds. More visitors from the local community arrive to pray, forcing Miyu, Kanata, and Bow-Meow to hide the supernatural beings and prevent any disruption. The group locates the seventh missing god and brings him into the temple to reunite with the others. Throughout the day, the three work to keep the gods hidden from the increasing number of shrine visitors. In the evening, the seven figures reveal themselves to be tourists who had dressed as the lucky gods for the New Year celebration. They depart peacefully, leaving the household to clean up and reflect on the unusual holiday. The next morning, the temple returns to its normal routine, though Kanata’s father remains nearby, hinting at continued parental attention.
73Episode 73
Ruuxa and the others try to return to normal after a chaotic incident. The alien toddler Wannya exhibits unusual behavior that disrupts the household. Kanata and Miyu attempt to manage her outbursts,but their usual methods fail. Wannya’s powers activate spontaneously, causing objects around the house to float. Ruuxa explains that her abilities are linked to her emotional state, specifically separation anxiety. The group realizes Wannya is looking for a familiar toy she lost. They search the house and eventually find the toy under the porch. Wannya calms down immediately, and her powers recede. The resolution highlights the challenges of caring for a child with unstable abilities. Later, a mysterious spacecraft appears briefly in the night sky above the house. Kanata spots the craft and wonders if it signals a new visitor or a threat to their fragile peace.
76Ruu-kun Is the Leading Role by a School Festival
Wanya receives a clearer signal from the rescue spaceship carrying Ruu's parents,indicating the team from Planet Otto draws nearer to Earth. Miyu's class chooses "Dream and Space (and Monkey)" as its culture festival theme, and Aya writes a musical drama with Ruu in the lead role. The friends gather unannounced at the Saionji residence during a holiday to work on their costumes. Chris briefly loses her temper when Kanata teases Miyu, forcefully breaking Santa's paper-mache UFO, but Aya calms her and she helps Santa remake the model. Students reveal their individual costume designs: Hikarigaoka presents himself as "The Star Prince," Chris follows as "Shooting Star," and Kanata's space shuttle design draws everyone's attention. The next day in class, while building the paper-mache shuttle, Chris asks Miyu directly if she will return to her own home after her mother's NASA work concludes. Miyu falls silent, and Hikarigaoka loudly worries that the group will be separated, leading classmates to wrap him in tangled thread. Wanya becomes so distracted that he fails to hear the phone ring while doing chores. Returning home, Miyu loses rock-paper-scissors and answers a phone call from her mother, who announces the space launch date is set and the family will soon be together again. Miyu stands in shock, unable to speak. Late that night, each member of the household learns of the impending returns: Miyu from her mother, Kanata from his father's mail, and Wanya from a message from Planet Otto. Miyu hides her distress behind a forced smile. The next day, during the musical performance, Miyu breaks down crying in Kanata's arms, and Hikarigaoka stumbles upon the family's secret.
77At the Night of the Full Moon
The morning news announces that Miyu’s mother has departed for space. Kanata,recognizing their limited remaining time together, takes Miyu, Ruu, and Wanya to the carnival with Momoka. Inside a ferris wheel car, Kanata, Miyu, and Wanya tell Momoka that Wanya and Ruu will return to space. Momoka and Ruu cry together, and Ruu displays his powers by floating in the air. Later, Miyu and Kanata reveal the secret of Ruu and Wanya to their friends and classmates. At home, Wanya transforms in front of the gathered group, demonstrating his alien nature while explaining how Miyu and Kanata came to live together. The friends hold a small party to celebrate the family’s time together. The festive mood ends abruptly when the Waru Waru UFO arrives, signaling a new and immediate threat.
78See You Again
Miyu and Kanata face the long-anticipated departure of Ruu and Wannya. A signal from Planet Otto finally reaches Earth,confirming that a ship will arrive to retrieve the alien pair. Ruu, having grown deeply attached to his human parents, senses the impending separation and begins acting out. Wannya prepares for the journey by methodically packing their belongings, his usual composure cracking under the strain. Kanata struggles to hide his own emotions, focusing on practical tasks to keep the household functioning. Miyu spends her remaining time holding Ruu, unable to voice her sadness. The group makes one last effort to create a joyful day together, visiting Ruu's favorite places in town. Chris and Momoka notice the somber atmosphere, though Miyu and Kanata cannot explain the true reason for their distress. The night before the scheduled pickup, the household sits together in silence, each lost in memories of their chaotic life as a family. As dawn breaks, a glowing light descends upon the Saionji temple, signaling the end of their shared life. Miyu and Kanata embrace Ruu one final time, acknowledging that raising him fundamentally changed them. Wannya bows formally before leading Ruu into the light, promising to remember them always. The departure leaves the temple quiet, forcing Miyu and Kanata to confront their now-unmasked feelings for each other and the future of their household without the child who bound them together.
Music
Opening
Saori Nara
Reika Nakajima
Ending