![Not you, But Your Sister](https://manhwasex.net/storage/images/cover/not-you-but-your-sisterczv.jpg)
Summary
I’ll help you masturbate.” Minhyuk is attracted to his girlfriend’s sister from the moment he saw her, who has the opposite charm to his cute girlfriend. Then, by chance, he sees his girlfriend’s older sister masturbating. He just had to pretend he didn’t see it…