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...
Instead of my porn mags, they'll find 
out about this outrageous fetish!
!سيرون أمامهم هوساً فظيعاً بدل المجلّات الفاضحة
¡¿En vez de las revistas, encontrarán 
todos estos fetiches raros?!
Em vez de pornô, vão descobrir
 esse fetiche ultrajante!