Because her husband passed away, Hijiri had to raise her child alone. She always wanted her daughter to study hard so that her husband could rest assured in heaven. But in the past three months, Shoko's grades have been continuously decreasing, which was also the time when she and Kiyoshi fell in love. And things got worse when Shoko discovered that Kiyoshi was having an affair with another girl. Since then, Shoko has not been able to concentrate on her studies, she is always sad and depressed. Because Kiyoshi was the one who made Shoko like that, Hijiri was determined to punish him by... fucking him! She called Kiyoshi to her house and pressed him down, straddled him and continuously slammed her big ass down on his cock without mercy. She used her pussy to suck all of Kiyoshi's sperm, forcing him to ejaculate into her pussy over and over again. She forced him to treat Shoko well, otherwise Hijiri would continue to "punish" him. But because she hadn't fucked for a long time, Hijiri's sexual desire was released. Even though Kiyoshi was still treating Shoko well, she still wanted to "punish" him. She was addicted to having sex with her daughter's boyfriend, and the two of them continued to have sex whenever they could. Until one day, Shoko returned home and discovered everything...