The protagonist of the story is ryousuke, who lost his sexual drive after being bound by a contract with lisara, the death goddess. despite living with her, he can't enjoy himself because he gave up his erotic spirit in exchange for the deal. he wonders if his youthful days are behind him and feels frustrated about it. furthermore, lisara informs him that he will die in three months, but she promises to change his fate if he helps her.
At the end he and Lisara start dating.