Katagiri Kyosuke, who came to Beijing from somewhere to attend college, is in a long-distance relationship with Saachi Koyamauchi.However, by chance, he met Kunikida Murasaki, a married woman who lives next to his apartment, and had a physical relationship with her.

The continuous unfolding of immorality had no resonance at all with Kyousuke's way of dealing with two women, but instead, it became a habitual love story.I don’t know whether the man I really love, Kyousuke, will choose a local girlfriend or a married woman in the city? What will happen to the shattered love that starts with incest?