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...
Uh, hasn't Ieyasu been crushed here? 
History's taken a whole new turn.
ألم يُسحَق إياسو هنا بالكامل؟ فتَغيّر مسار التاريخ جذريًا
Vaya, ¿hicieron puré a Ieyasu? 
¡Cómo cambió la historia!
Ah, não foi onde Ieyasu foi massacrado?
 A história mudou de curso.