I was wondering, but with the amount of time, he's spending on studying and still gets low results, he's either a braindead or all that cram schools are scams.
So he is in his high school endgame and has a seriously important test ahead of him, but his parents don't give him a break and he still has to help out... Wow, seriously...
14 h/day of studying is insane. And I seriously questions the effectiveness of it.
Apart from that, Megumi's single tooth moving from left to right and back is quite hilarious.