Kanna's husband used to be her superior, he had a late wife and was taking care of their son Yuzuru. Kanna wanted to support him and soon they started dating and got married. Yuzuru left for the city to study around the time of their wedding. Kanna's husband wanted Yuzuru to come back home for the summer break, but he had to go on a business trip, leaving Kanna and Yuzuru alone at home. Kanna tried to bond with Yuzuru, but he did not see her as a mother figure. Kanna's large breasts were constantly sweating in front of Yuzuru, and she even massaged his back, which made him unable to resist anymore. That night, he took advantage of Kanna while she was sleeping. Due to lack of intimacy and Kanna's desire to get closer to Yuzuru, she weakly resisted and eventually accepted this inappropriate relationship...