Yes it's childish, and goofy, but I'll tell you how I saw it. It's kind of a more realistic take on one punch man. Basically, this kid has amazing strengh bestowed on him, however, his body is not yet trained enough to handle this strength, so actually trying to use it breaks his bones and damages his body. The reason why this is great is because I'm tired of these anime with auto win characters. I like characters that, though they may have great strength, have to learn how to use it. For instance: Dragon Ball Z. Yes Goku is an auto win, and all of the characters basically see him as this. But everytime an new, more powerful villain appears, we have tons of episodes of him training to be able to beat them. So he may be an auto win, but he has to work for it, and still struggles.
So Academia gives us this hero who may very well one day be an auto win of sorts, but for now his own body can't handle it, and we get to watch him grow as his body becomes more and more use to these abilities. The anime also gives us moments when he has to use all of his power, and does it in a rather cleaver fashion as to limit the damage he would take.
The characters are also crazy enjoyable, and play off of one another really well. There also isn't a real romance here, so the story doesn't rely on that to connect the characters to one another.
Also, the colors used, and the set design is awesome, and a pleasure to look at. The powers used by the characters also feel original to this story, and are in there own right well thought out.
