Miyako Hoshino, a shy and socially awkward college student, becomes enamored with her younger sister Hinata’s classmate, Hana Shirosaki, after a chance encounter. Hana, a cheerful and innocent elementary school girl, captivates Miyako with her angelic appearance and demeanor, leading Miyako to develop an intense but innocent admiration for her. Despite her overwhelming feelings, Miyako is determined to keep her adoration pure and respectful, often struggling to balance her emotions with her desire to maintain a healthy relationship with Hana.

The series explores Miyako’s efforts to connect with Hana, often through crafting handmade costumes and accessories, which she uses as a way to express her affection. These creations become a recurring motif, showcasing Miyako’s creativity and dedication. Hana, unaware of the depth of Miyako’s feelings, views her as a kind and supportive older figure, often participating in Miyako’s costume ideas with enthusiasm. The dynamic between the two is central to the narrative, with Miyako’s internal conflict and Hana’s innocence driving much of the story’s charm.

Hinata, Miyako’s younger sister, serves as a grounding presence, often teasing Miyako about her obsession with Hana while also providing emotional support. Hinata’s interactions with Miyako add a layer of sibling humor and warmth to the series. Other characters, such as Noa Himesaka, Hana’s classmate and friend, contribute to the story’s lighthearted tone. Noa’s playful rivalry with Miyako and her own admiration for Hana create additional comedic and heartfelt moments.

The narrative unfolds in a slice-of-life format, focusing on everyday interactions and small, meaningful events rather than a central overarching plot. Themes of friendship, family, and personal growth are explored through the characters’ relationships, with a particular emphasis on Miyako’s journey to overcome her social anxieties and express her feelings in a healthy way. The series balances humor and emotional depth, creating a wholesome and endearing portrayal of its characters and their connections.