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...
why don't you take it from 
the top, one more time?
أرجو أن تعيدا إلقان الأمر منذ البداية
¿por qué no vuelven a 
enseñarle desde el principio?
por que não começam do zero de novo?