Yusuke Saito is a normal high school kid...well, normal enough, except that he can't remember anything from his life except the last six months. But when he starts to get confronted by people who insist they're from his past, who allege that he did horrible things to them...suddenly Yusuke's missing memories become crucial to remember. Otherwise, the skeletons in his closet may just make him a skeleton, too...
On a roof overlooking the city lights, Yusuke Saito—his memories now fully revived—confronts Akari Ichinose. She's tormented by a curse that echoes deep within the night...and death seems like the most attractive way to escape it. The couple spent years loving, and killing, each other—perhaps this end was fated all along. But still, despite it all, they manage to find value in their lives...