After taking a kihei as his Bride and overcoming the massive invasion known as the
Gloaming, Kou Kaguro has finally earned some peace for himself and his friends. But
as they prepare for a festival to commemorate his hard-won victory, the unthinkable
happens-Kou is murdered. Over and over, endlessly... Surely there must be some
mistake? And what does all this have to do with an unexpected transfer student?