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...
It's still somewhat off, but at least 
they've managed to get back on track.
لا يزال الأمر يفتقر للدقّة، لكنّهم عادوا للمسار الصحيح نوعاً ما
Aunque no esté del todo
 correcto, se reencaminó.
Não é bem isso, mas ao menos 
eles voltaram ao caminho certo.