Ayase Kokoro had to stay at home for a few days with her brother-in-law, because her sister went on a business trip for a few days. Every day she still lives normally, but this brother-in-law watches her every move, even masturbation. While she was fast asleep, she was attacked by this brother. Although she fought back fiercely, she was eventually fucked to pieces. That whole night she couldn't sleep because she was scared, but she was psychologically manipulated by this guy. And in the days that followed, the two came together like a habit, having extremely hot sex..