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...
Heijo-kyo came to prominence 
during Empress Genmei's reign.
ذاع صيت هيجو كيو خلال فترة حكم الإمبراطورة غينميه
Heijo-kyo fue establecido 
por la emperatriz Genmei.
Heijo-kyo ganhou destaque durante
 o reino da imperatriz Genmei.