I did enjoy kodomo no jikan a whole lot.
To explain the bad rating, I must tell you my thoughts about the prequel's ending.
The way Kodomo no Jikan ended, it didn't need a sequel. It ended in a way all of the characters have learned a huge thing about life, Aoki, Kokonoe and Seiji. It didn't end in a disappointing way at all, I didn't feel the need to know anything more, the ending of the first season ended in a way that let us dream about their future, but implied it would be happy anyways. Not a whole lot of interesting stuff could happen after what has already happened.
Since they are like 1 or 2 years older and they all start to grow up, you would assume kokonoe, mimi and kuro would be even more mature but they're just not. Kokonoe lived so much intense stuff and doesn't act like she did. Mimi is even shier and kuro is even more uninteresting. The characters are counter-intuitive of what the pre-quel wanted to be.
But honestly all the content of the meager 4 episodes are just recycled patterns and reactions / problem solving of the mid-series of the first season and also sub-characters development. They just mimicked the old personalities and put them in some situations. What makes it horrid, is that everything and anything that made tbe original story good was the characters and the relations they had between each other. They butchered this principle in Ni gakki.
I'll give as an example the f**king weird scene where kokonoe sucks Mimi's nipple.
If you plan to watch this right after you just watched the sequel, don't. You'll find nothing satisfying. You'll lose your ferric opinion view about the sequel.
