If you teach me to study, I'll teach you how to do it instead of you.

A mother-in-law who did not study until now has suddenly gone to the University He said. I was taught by my mother-in-law. Impossible! It's too bad! I give up my foolish sister too early. However, my sister told me that she would teach me how to teach her. I'm very good at studying because I'm good at studying. Result: winwin's equivalent exchange establishment! Start private lesson in secret!