Kulas, a boy with amnesia, is transferred to a strange boarding school with sirens blaring. All the students at the school have developed a mysterious condition called "trance," which causes them to turn into monsters when their emotions become agitated. Class is confused when he is told that he is also a "trance" patient, even though he is unaware of it. Furthermore, she becomes roommates with a boy who kisses her out of the blue. This is the start of a bizarre and profound school fantasy interwoven with a group of highly individualistic students!