Weeks after giving birth to her first child, Hajime, at her son Hiroshi's place, Kaoru receives a visit from her family. On that day, Hiroshi and his wife, Junko, arrive at Kaoru's home with their first grandson, Takuya. However, Takuya's behavior unsettles Kaoru, making her eyes narrow with discomfort. The next day, Takuya leaves with Junko to visit her parents' home, leaving Hiroshi alone with Kaoru. Perhaps due to abstinence during pregnancy or the pressure of fatherhood, Hiroshi grows increasingly dependent on Kaoru.