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...
Well, let's leave the Excalibur 
Omega on the sandals for now.
لنترك أمر إكسكاليبر أوميغا على النَعلين الآن
Bueno, olvidemos las sandalias 
y la Excalibur Omega.
Bem, vamos deixar a Excalibur
 Ômega do lado das sandálias.