Ayumi Arihara wants a boy to confess to her. She got her wish in an unsettling way: after school, the monstrous Misao Zaitsu gives her a love letter and confesses his feelings to Ayumi. Because she doesn't like him and she is afraid of him she thinks of a way to reject him but is afraid of his answer. The next day in school she is carried by Mamoru, Misao's younger brother, to the infirmary and falls in love with him. After the school she is kidnapped and held hostage by some guys who want to lure Misao out.