キガギガ

Keiji Sakuragi is a second year student in a prestigious school Saji Academy. While he lives in busy days as the head of the school council, he is suddenly confined in a locked room that he has never seen. In this room, his classmate, school teacher, younger student and a "man of the type that he hardly interacts with". A man tells Kieiji that... "Everyone in this room are not human." When the relationship among five is distorted by this extreme circumstance, some abnormal changes arise from their bodies...