Yuta and Naoko had been living together for five years, and Yuta had always treated her kindly in the same gentle way. However, they hadn't had sex for the past year. Naoko suffered deeply from the lack of intimacy. One day, she met Takel, who had just moved in next door. Takel was bright, warm, and spoke to her in a way that touched her heart. Drawn to his warmth, Naoko chose to spend a night with him. Yet guilt toward Yuta tightened her chest. In the end, she resolved to break up with Yuta.