Become Famous in Ghost School

The male protagonist experienced horrific events in the "ghost school", and solved the horrific and mysterious events with his companions who also didn't know how to enter the "ghost school". So among us, who has been lying, and what frightening evidence is there in the corners we don't know. Is this world real? Or was it created by a thoughtful person? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.