An office lady is reincarnated as a dating game villainess and seduces the hero so that he will hate her, but he instead falls in love with her.

An office lady who is reincarnated into her favorite dating video game as the villainess Diana. Prince Sirius gets close to Diana, although he is supposed to love the game's heroine. In an effort to prevent the bad ending which leads to the world's destruction, she seduces him, believing that the prince will dislike her impurity. However, despite her efforts, the prince ends up falling for her.