I think it's like a cultural thing, probably somebody inspired a character from someone vvho vvas like that and then it got picked up by most mangakas. It's on the same line vvith mc that has no parents in his life.
This trope of an mc being nagged and teased by a love interest has become so obnoxious. Ok yea some ppl are like that, but having that being the sole characteristic of their personality is so lazy. To me this had potential but it is Don't tease me ms Nagatro only the roles are svvapped and they...