Enough with manhwas

This is question is for boomers/old gen and specifically for manga only.

What old freaky/unhinged manga you've read or like that the new gens would turn into a karen if they read it too?

Mines be Okane Ga Nai haha. The twink uke is more or less looks like a child whereas the seme is like twice his size lol and their long ass arms haha, but still enjoyed it regardless and kept coming back to it. It's one of the first few mangas that pulled me into this rabbithole so it's kinda close to heart haha