Karen's love for her husband, who was devoted to his work and did not care for his family, had cooled, and her only joy was watching her son grow up. As long as her son was happy, that was all that mattered. Karen truly believed this, but her mother's expression was somewhat melancholic, and her son was Kokoro every time he saw her like that. One day, unable to bear to see his mother looking lonely, the son took the unexpected action. Karen felt the same way. The two of them sought each other's lips and bodies as if in a feverish state...