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...
You must turn this room into a fortress that 
exists solely to protect your porn mags!
عليك تحويل هذه الغرفة إلى حصن مخصّص غرضه حماية المجلّات الفاضحة
¡Tu cuarto entero debe ser una 
fortaleza que proteja tus revistas!
Este quarto precisa virar uma fortaleza 
que só existe para proteger suas revistas!