简介：Day（小面包饰）和Night（Dew饰）分别出生在闰日（2.29）的正午和午夜，他们是被诅咒之人，每四年一次的闰日不仅标志着自己的诞生，也预示着所爱之人的死亡。

简介：A homeroom teacher held 29 students hostage as vengeance for the mysterious death of their roommate. Their act takes a toll on life and sorrow. This bloodthirsty lesson brings up the raw characters of human beings.