His lover's boyfriend came to the house to visit when he happened to meet his lover's sister in the bathroom, a personality girl named Yua Mikami, who was having sex with her boyfriend in her bedroom, and had a hobby of SM. After that, he peeked but he didn't expect Yua to find out a long time ago but still let him see. After that, he became passionate about this hobby and could no longer resist his lover's sister's lust.
![The perverted hobby of Yua Mikami's lover's sister](https://cdn-01.w3img.com/images_new/full_size/e_yYBQ6EbPIZitglamA4HUzX2.jpg)