Well... I cried a bit. While time traveling is done wayyy too often in novels, specifically saying, those crappy online novels written by mainland chinese, yes, those in which does nothing but show off and swear, they aren't seen that much in mangas. And the rare occasion that they are shown, honestly, I didn't like those either =/. While 2 chapters aren't enough to say for certain that the time traveling won't be the downfall to this manga as well, it certainly is original and interesting.
While I do know about exclusion and that sort, I never really believed that physical bullying is actually a common thing around. Often those bullying things just don't seem realistic enough =/. Whether it exists or not, I find that the way it is written in this case is believable and touching. I won't go into details and spoilers, but I'll say that it's definitely one that you can actually sympathize with.
The art isn't much to complain about. Not much to say, it's not bad art, but like most other mangas these days, there's not much else to it.
In any case, this definitely seems promising, and I do hope that it'll remain this way until the finish.