bruh idk everytime she says "oppa" im cringing

Well oppa literally means older brother so it shouldn't be cringy.

Many people think "the world is Western like so why use Korean pronoun/prefix?"
Can't say I don't understand tbh
And when you read the comments about "spoiler" (a.k.a futures relationships between the characters) it can be cringe for some people?

I see. In that case, yes it might be.