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...
so I used the ancient weapon, Excalibur Omega,
لذا استعملتُ السلاح الأثري، إكسكاليبر أوميغا
así que utilicé la Excalibur Omega 
para calentar sus sandalias".
então usei uma arma 
antiga, a Excalibur Ômega,