Gin-san takes history lessons, and teaches you how to hide your porn mags?
Tsukuyo tries to teach Seita history, the subject he's not great at. However, her training (?) methods end up leaving him scarred, which makes desperate Seita ask Gin-san to take over as his tutor...
What do you think you're teaching him?
ما الذي تقوم بتعليمه إيّاه؟
O que você pensa que 
está ensinando para ele?