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...
Don't hide porn mags in your room.
لا تخبّئ المجلّات الفاضحة في غرفتك
No las ocultes en tu cuarto.
Não esconda pornô no seu quarto.