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...
were Takeda Shingen and 
his rival Uesugi Kenshin.
كانا تاكيدا شينغين وخصمه أويسغي كينشين
eram Shingen Takeda e 
seu rival, Kenshin Uesugi.