Feast of Amrita

On her way home from school, together with classmates, a high school girl named Tamahi witnesses the fall off of someone from the rooftop of a gigantic apartment building that stands before them. Panicked and confused, Tamahi and her classmates rush to the place of the fall inside the apartment building, but there is no trace of anyone. As she wonders about this, she begins feeling uneasily watched and strange presences around her.