Recently, Mizuki had almost no intimacy in her marriage and was beginning to forget herself as a woman. Then one day, Yosuke, the son from next door who hadn't visited in a long time, ended up staying overnight at her house. That night, by chance, they kissed—and Mizuki felt her body tremble. As he touched her, her body awakened with desire, and once it started, she couldn't stop. Though Mizuki had always been conscious of their age difference, she gradually became drawn into a relationship with him, marking the beginning of a new romance.