| Manabu Ochiai|
|School||Sankai High School|
He’s been trying to study for his college entrance exam coming soon, but constantly ends up falling asleep. Other students tell him it’s normal, but he suspects something supernatural is ailing him and so asks for Rinne’s help. It is discovered that his tutor named Keiko, whom he has a crush on, unwillingly unleashed a spirit of her former-self, who lulls students into falling asleep, to keep them from overworking themselves. Although the case is solved, Manabu's study habits do not improve much at all.