"How can we make this world better?" St Venille High just got blooder! A fresh batch of students got enrolled in the 6th class. In the bizarre world of St. Venille, are you ready to unfold its darkest mystery? Once you're in, there's no turning back. In order to survive, you shall remember the only rule of this class: it's to kill or be killed.

Would you love someone just because you pity her? Would you agree in an agreement that you'll gonna love a sick person? Would you agree to marry her, a person that you barely know? Could you love someone in your remaining days? Would you agree to live in the same roof in 100 days with a dying person?