I mean, the fact that this MC really is a heartless evil demon but wants to be good weighs more to me than an MC that has a heart of an angel just because.
While the ugly MF of Angel Densetsu beats delinquents here and there with the power of absurd reflexes, this king has spent middle school training his body in sport clubs and street fights and now wants to purify his spirit in high school tea club. Ok, the past about his father was a bit lame and I would have preferred the author to keep only the grandfather's flashbacks but a fair reason nonetheless to want to be better.
The love interest was on point. In the very beginning Ma-Kun was captivated with the kind-hearted, traditionalist wife material that is the president, and that prompted the MC to be a better person, also that is why a relationship with Kaho, the total opposite of that, would be forced. Not every character in a work of fiction has to be three dimensional to be good.
The comedy in this manga is gold and unlike Angel Densetsu, it's not about the same misunderstanding jokes like "hurr you look ugly so you must be bad. Oh, wait, you actually good". I laughed with every interaction with Blue and although it's true that he was left behind in the end, the point with him was made, he realizes that he cannot compete with our boy and he would benefit more from being his friend.
And what'd you guys mean with a bad ending? The ending gives closure with the MC's psyche and it was a pretty close ending if you ask me, it's very obvious that the main couple ends together, what else do you want? this manga is not about dorky couples, it's about the ways of a gentleman.
Don't get me wrong, I liked Angel Densetsu as much as the next guy but this manga right here turned me into a fan of the Japanese Delinquents trope.