This drama is adapted from the manga of the same name. It tells the story of Kyosuke Katagiri, who came to Tokyo from the countryside to attend university, and Sachi Koyamauchi, who are in a long-distance relationship. However, due to an unexpected opportunity, he met Kunikida Shino, a married woman who lived next door to his apartment, and had a physical relationship with her. Kyosuke, a man who doesn't know what he truly loves, will choose his girlfriend from his hometown or a married woman in the city?