Ayumi came to school one night to find a masked man. She told the vice-principal about it and he became absent for the last two days and the other teachers are acting suspicious. The Detective Boys sneak into the school at night where they find puppets with their names on it, mannequins and statues being moved, and someone trying to scare them with red paint and dry ice. The Detective Boys pretend to be scared and hide in the bathroom. When they come out, they find their teacher, Ms. Kobayashi, secretly practicing for the parent meet. However, she claims to not have tried to scare them off and they realize that someone else is indeed in the school. However, it is actually the vice-principal who lost his toupee and had been searching for it for the last two nights.