There's a rumor going around campus that the ghost of an elementary school girl has been appearing when no one's around. As the school's disciplinary officer, Nakajima has the responsibility to find out what's actually happening.


While doing the rounds after school, Nakajima finds the so-called ghost in one of the classrooms, using a desk to masturbate. She tries to flee, but Nakajima quickly apprehends her. Instead of resisting, she introduces herself as Mai and offers him a reward for catching her.