Manami and Yuta began dating in college, and after two years of long-distance romance following graduation, they finally got married. Yuta, the heir to a liquor store, moved in with his parents after marriage, and Manami joined them as well. Before the wedding, her relationship with her in-laws was good, but after starting to live together, differences in values and the decreasing intimacy with her husband led to growing dissatisfaction. One day, she met Noriyuki, her husband's cousin, and found herself drawn to his warmth and kindness.