LY School is a well-known "ghost school", not because it is often haunted, but because of the terrifying legends. Of course, ghosts do exist, but not everyone can encounter ghosts.
However, this world is not all cowards. There are also some good ghosts who like to joke and make trouble. And because LY is a rare place to raise ghosts in this busy city, most ghosts who unfortunately die in this busy city and do not want to be reincarnated will come to this school. And because it was too boring, I annoyed the students in this school for fun...