The day of the school festival. The students are tired from the preparations and have fallen asleep. They give up trying to make it in time, and cancel their haunted house. Then, as someone comes in, numerous "ghosts" appear and surround the person. One ghost reveals herself to be Yurina Hirate, and she unravels the mystery of Tokuyama's death. So, who killed Daigoro Tokuyama?
One morning, students find their homeroom teacher Tokuyama Daigoro’s body on the floor of the classroom. A strange school life begins as the students work hard to hide the presence of their teacher's corpse in their classroom. Other teachers from the Academy, their homeroom teacher's wife, his mistress, police, and reporters... One-by-one they visit the classroom and the students face the risk of being discovered. Is it possible to continue to hide it?! And who was it who killed him?!
