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...
If even you come to this side, how are 
we gonna return history to normal?!
كيف سنعيد التاريخ إلى طبيعته إن أتيتِ إلى هذا الجانب؟
¡Aunque estés de mi lado, ¿qué harás para regresar la historia a la normalidad?!
Mesmo que você comece com isso, como
 vai fazer a história voltar ao normal?