Ryûnosuke Okada

A mysterious creature destroys part of the moon and then warns that, if it is not destroyed before March of the following year, Earth will be next. It also demands to become the homeroom teacher of Class E, a third-year class at Kunugigaoka High School.

Junior high school teacher Koyama Akira has the ability to sense ghosts, and his new school has a ghost named Akane who used to be a teacher.