A ghost trapped in a dying building reaches out to the only person who will listen. Takahiro has to choose between the comfortable weight of leaving things alone and the harder work of saving something nobody else can see. The OVA moves fast and doesn't linger on explanation, trusting you to feel the dread in the architecture before the story even starts.
When Takahiro and his classmates stumble upon an abandoned structure rotting away at the school's perimeter, they expect nothing more than a forgotten relic. What they discover instead is Saki, a presence that exists between worlds, trapped in a deteriorating space that mirrors her own unraveling existence. As the building crumbles further each day, Saki's reality fractures alongside it. The mystery deepens when the group realizes they're not just observers but witnesses to something far more sinister: a force working to erase Saki from existence entirely. Takahiro finds himself pulled into a quiet, melancholic supernatural struggle where every moment counts and every action carries weight. The atmosphere shifts between the mundane details of school life and the ethereal dread surrounding this mysterious entity. There's an urgency beneath the surface, a sense that time is running out not just for Saki but for those who've made contact with her. If you're drawn to stories where ordinary people brush against the extraordinary and must confront the impossible with limited understanding, this compact narrative delivers genuine tension wrapped in atmospheric mystery.