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...
I daresay a guy that lazy would never 
get anywhere in the real world.
لا أحسب صبيّاً بتخاذلك سيصنع شيئاً في العالم الحقيقيّ
No llegarás a ningún lado
 si eres un holgazán.
Ouso dizer que aquele preguiçoso não 
chegaria a lugar nenhum no mundo real.