Aoi Hoshino, a 14-year-old girl, stumbles upon a life-altering secret: her parents are extraterrestrial beings relying on a specialized serum to preserve their human disguises. This discovery unfolds alongside her younger brother, Yuta, as they accidentally expose their parents’ hidden truth. The serum, designed to suppress their alien forms, starts failing within Aoi, triggering erratic physical transformations that fracture her sense of self and plunge her into turmoil over her identity and family’s concealed origins.

Her once-stable family life unravels as the serum’s degradation accelerates, shattering illusions of normalcy. Aoi must navigate the dissonance between her parents’ true nature and the life they’ve fabricated, confronting existential questions about her own humanity and place within this fragile dynamic. The narrative delves into her visceral reactions—swinging between dread, disorientation, and desperate attempts to cling to familial bonds as instability mounts.

Aoi’s journey traces her turbulent reckoning with secrecy and belonging, paralleling the serum’s accelerating breakdown. Her struggle mirrors universal tensions between assimilation and authenticity, reflecting the corrosive weight of concealed identities and the isolation of living a lie. Though her ultimate choices remain undefined, the story frames her crisis within the confines of a single, pivotal chapter—an animated short film offering no extensions, spin-offs, or resolutions beyond its 30-minute exploration of her fractured reality.