As second seasons should be (IMO), "Mahou Shoujo Nante Mou Ii Desukara. 2nd Season" is so similar to the first one that both seems to be just a split of the same season separated by 6 months. So, here's a suggestion for those who have watched the first season, but not the second one yet: if you liked it, watch this; if you disliked, don't watch. Quite simple, huh? I mean, since these seasons are so alike, you shouldn't bother to watch something you don't like, even if it's just around 48 (12x4) minutes [by the way, I think it's better to watch one episode per day or something like this than watching it all in one go, it's a short to be "tasted" not devoured].
Slice of life, comedy, and magic, everything was maintained/kept. Yuzuka's father is still a real workaholic (work-addicted), Miton is going to be even more over-punished/abused (mostly by Chiya). Mafuyu's grandpa, a crazy gamer and probably the funniest character, shows up. There are more Dia (Daiya) appearances and explanations about her. There are only little changes: Yuzuka was more "childish" and had a more high-pitched voice (like 2 years younger, but I don't know if she has really aged) and used to be more embarrassed by Miton's "harassment". The first season was a bit more cute and a bit less funny.
Some episodes are specially aimed at the Japanese audience, so you might miss a joke (for example, the episode about Japanese writing) or get the wrong idea sometimes (there's a satirical episode about overwork, which is very common in Japan, that some people didn't understand very well).
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Any comment (especially grammatical or structural comments) about this review will be greatly appreciated. English isn't my first language.