Yuzuru returned to his hometown during the summer vacation. Upon arriving home, he was warmly welcomed by his sister-in-law Kana. Yuzuru couldn't take his eyes off her body when her sheer outfit revealed all her lingerie underneath. Lately, the relationship between them had not been good, as it seemed Yuzuru's brother had been involved with another woman, making Kana angry. That night, when Yuzuru accidentally saw his sister-in-law naked in the bathroom, her genitals pointing straight at him, he quickly closed the door, apologized, and left. That night, passing by their room, Yuzuru witnessed Kana putting on lingerie again, indicating that the couple had just had sex.PFES-067 My promiscuous sister Despite noticing Yuzuru's gaze, Kana still acted as if nothing happened and presented her buttocks towards him. The next day, Yuzuru caught his sister-in-law masturbating. This time, he couldn't resist anymore. He opened the door, stepped in, pulled out his penis, and inserted it into her vagina, while she showed no surprise or resistance. And throughout his stay, Yuzuru and his sister-in-law secretly maintained this illicit relationship...
