HUNTB-104 「공부를 가르쳐 주면, 대신에 야한 것 가르쳐 준다」야리만 너무 성적이 괴멸적인 여동생과, 공부명으로 동정 나와의 교환 조건부 개인 수업.

배우

素人

One day, my sister-in-law, who had never studied at all, suddenly announced that she was going to university. At her mother-in-laws request, I decided to teach her... This is impossible! I cant do it! My sister-in-law is so stupid that I give up. However, my sister-in-law says that if she teaches me how to study, she will teach me naughty things... Im a hard worker and good at studying, and my sister-in-law is a slut and good at sex... Result: Win-win equivalent exchange established! A secret private lesson begins!