Because her husband had to go on a business trip, Hikari had not had sex for a long time. Today, her daughter brought her boyfriend home. Witnessing her daughter and the boyfriend having sex made Hikari feel extremely aroused. A few days later, because the school organized a trip, her daughter would be away for about three days. Yudzuru came to look for her because he forgot to charge, she helped him search but accidentally revealed her underwear, making Yudzuru unable to control himself. "You always pay attention to me! I can't take it anymore!" Hikari tried to resist and reminded herself that she couldn't do this, but deep down she knew she always craved sex, wanting her daughter's boyfriend to satisfy her desires that had been pent up for so long. When Yudzuru made her climax, she decided to let go following her emotions. After this time, both Hikari and Yudzuru could not forget each other's bodies. The two secretly dated and had sex whenever Hikari's daughter was absent...