The college prep nephew arrives at the Takakura household again this year for entrance exams, beginning life within the family atmosphere. However, Rina is pained by her husband and daughter's thoughtless words and actions. One day, she attempts to make love with her husband for the first time in a while, but he brushes her off with "next time" and falls asleep. Depressed, Rina heads alone to the bathroom, washing her body until she begins touching herself, masturbating to ease her aching desire. The next day, her nephew returns home from his exam, and Rina asks how it went. He confesses he couldn't concentrate during the test—because of what he saw yesterday. Apparently, he witnessed Rina's masturbation, and has been erect ever since. Shocked by his sudden confession, Rina is overwhelmed by his intensity as he forcefully ejaculates thick cum into her mouth. In that moment, a new emotion begins to stir deep within her heart.