As a punishment for being late to class, high schooler Kanata, has to ring a bell of an old, abandon church near his school. Unexpectly, the floor collapses beneath him, in return he discovers a cross shape coffin. Awakening something that should've been kept in eternal slumber. Not only taking his life but Kanata's destiny had forever changed from that moment on. He is soulbound to the vampiric creature?!