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...
In order for the room itself 
to hide the porn mags,
لكي يصبح بمقدورها فعل ذلك
Para proteger tus revistas, le daré 
una apariencia que haga juego con ellas.
Para que o próprio quarto
 esconda o estoque,