An art teacher and a music teacher fall in love in the Tezuka Academy. However, the school forbids them from dating each other and the romance ends in tragedy when the art teacher disappears and the music teacher dies of a broken heart. 80 years later a student in the same academy commits suicide and leaves behind notes for the mysterious "Claire De Lune" - the same song that the music teacher used to play. Soon after that, strange and horrifying things start to happen to other students as well.