A general description of this manga for anyone wondering if it's good. Or rather, a pitch since personally, I really, really like it.
Firstly, everyone in the story is dumb, but in a cartoonish, comedic way. Unlike usual instances of hot-blooded dumb shounen protagonists, everyone here is more dumb in a...dorky, sincere way and it's fun to watch.
Speaking of shounen, our MC also radiates an unending sheer optimism, and he does so in a way that's honestly heartwarming. We know he's stupid. We know he's dense. But he tackles his life with such gusto that you actually don't mind.
The same applies to the other characters. The newest chapter had us refreshingly avert the "jealous peers" trope splendidly and interactions with the MC throughout the story have been nothing short of wholesome.
I have no idea what that harem tag is doing there at the moment. The rest of the cast are women so far, but besides that nothing particularly harem-y has happened.