Chitose is a female teacher who is highly trusted by students and parents because she is good at teaching. One day, Chitose encounters a fool on a commuter train. "No way, I'm going to have a fool ..." I can't make a voice out of fear at the sudden event! !! And in a blink of an eye, I'm surrounded by a group and I'm attacked by all-you-can-eat. And it was seen and photographed by bad students who were resenting the whole story. "If you don't want to be dismembered ..." Ryo ●'s chain has begun ...