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...
But I thought Hideyoshi 
had the nickname "Monkey."
لكنّي ظننتُ لقب هيديوشي كان القرد
Pero creía que a Hideyoshi 
lo apodaban "Mono".
Mas achei que Hideyoshi 
tivesse o apelido de macaco.