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...
"Every day, someone in the world
is celebrating a happy birthday."
"هناك من يحتفل بعيد ميلاد سعيد في العالم كلّ يوم"
"Cada día, alguien en el 
mundo celebra su cumpleaños".
"Todo dia é aniversário de alguém."