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...
First, move the furniture around, 
and put padlocks on all the storage.
عليك تغيير مواضع أثاث غرفتك أوّلاً، ونصب قفل على جميع حجرات التخزين
Mueve los muebles y pon 
candados en todos los cajones.
Primeiro, mude os móveis de 
lugar e coloque cadeado em tudo.