[HUNTB-104] "If you teach me to study, I will teach you naughty things instead" Individual class with exchange conditions with my sister-in-law who is too bad at grades and me who is a virgin with a study life.

One day, my sister-in-law, who had not studied at all, suddenly said, "I'm going to college!" I was supposed to teach at the request of my mother-in-law. I can't do this! I can't do it too much! I give up as soon as possible to my sister-in-law who is too stupid. However, my sister-in-law tells me that if she teaches me to study, I will teach naughty things. I'm good at studying with a study tsutomu, my sister-in-law is Yariman, so I'm good at sex .... result... Winwin equivalent exchange established with each other! Secret private class starts in!