Hajime leads an unremarkable life as an undertaker, but he likes his job and has no reason to complain. Nor can he complain of being always called "onii-san" by one of the top star actresses in the country, Kidō Kotone, a childhood friend. Their relationship has always had a touch of awkwardness due to the parents of both having died violent deaths, but nothing could have prepared Hajime - or Japan - to the deed Kotone decides to perpetrate seemingly out of the blue.

Yusuke Saito is a normal high school kid...well, normal enough, though there's six months missing out of his memory. 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 realizes that those missing six months may be crucial to remember. Otherwise, the skeletons in his closet may just make him a skeleton, too...