Six months have passed since Ayaka married a man with a child from a previous marriage. Her relationship with her husband has settled down, and their nighttime activities have become less frequent, leading to more and more days of frustration. However, her child, Hideo, is wasting his youth and releases it by masturbating almost every day. Seeing this, Ayaka's body throbs even more. One day, when she enters Hideo's room to wake him up, she is excited by his morning erection and touches it without thinking... Ayaka has no choice but to stroke him with her hand. However, Hideo's virility is not satisfied after just one or two ejaculations...