OVA
Description
Maroko Yomota arrives unexpectedly at the Yomota residence, claiming to be the future granddaughter of the teenage son, Inumaru, via time travel in a machine disguised as a yellow Kodak blimp. Her initial appearance features a distinctive yellow wide-brimmed flower hat, referencing 1920s Japanese "moga" fashion, a style akin to American flappers symbolizing emerging Western influences.

Her presence fractures the family. While Inumaru and his father Kinekuni accept her claim, Inumaru's mother Tamiko vehemently rejects her identity and abandons the household. Maroko begins with a demure, childlike demeanor but gradually adopts a more sexually suggestive and mature appearance. Her clothing shifts between traditional Japanese outfits, modern swimwear, and WWII-era waitress uniforms, reflecting tensions between tradition and modernity.

Maroko forms a complex relationship with Inumaru, developing romantic undertones despite her purported status as his granddaughter. This complication intensifies when Bunmei Miroto, a time patroller sent to arrest her for temporal violations, is revealed as their son. Thus, Maroko is simultaneously Inumaru's granddaughter and the mother of his child. Her temporal displacement and paradoxical familial ties intensify the family's dissolution.

A star-shaped birthmark above her buttocks serves as a physical identifier linking her to the Yomota lineage, potentially alluding to "Mongolian spots" associated with shared ancestry. She embodies conflicting cultural forces, yearning to honor tradition while inadvertently accelerating the family's embrace of Western individualism. Her actions, including illicit time travel, attract temporal authorities and hasten the household's collapse.

The story concludes with her disappearance. Inumaru, burdened by guilt over the disintegration, perishes in a snowstorm fixated on memories of her, accompanied by the fleeting image of a yellow butterfly—a traditional Japanese symbol of womanhood and nobility. Throughout, Maroko functions as both a catalyst for the family's unraveling and a metaphorical reflection of Japan's struggle to reconcile heritage with external influences.