I wanted to like this manga. I really tried to like it, persisting in the hopes it would improve. Maybe you'll have better luck with it but I just couldn't get myself to care about any of the characters. I was promised "charming" and amusing, I personally wasn't getting either.

The issue I have with the story is that it strains believable far beyond anything I can cope with. Not in the sense that it's physically unbelievable, though from a quick skim of the last few chapters it seems it did end up that way, I mean the characters and their behaviour is unbelievable.

Actually, let me summarise the premise as it appears to me:
Business dynasty heir experiencing extreme pressure and expectations discovers a colony of homeless lunatics and criminals and decides the most rational way to repay a life debt is to join them and pretend to be insane as well, somehow overlooking the multiplicity of issues and better ideas.

Spoiler: Seems like 410 chapters later he's still living under the bridge and things are even less sane.