With her husband working overseas and her son in a rebellious phase, Yuka is feeling lonely and frustrated, and masturbation has become a daily habit. One day, her son's friend Makoto comes to visit and injures both of his hands. Feeling sorry for him, who is unable to cope with everyday life, Yuka offers to take care of him... Unlike her rebellious son, Makoto's honest reactions make Yuka feel joy in servicing him. One day, while Makoto is being wiped down, he gets an erection. Yuka can't help but feel a tingling sensation from his strong cock...