Responses
Earlier they explain that the family owns a really popular restaurant chain, so it's like if they owned McDonalds or something
And they mentioned in one of the early episodes a creator whose parents own a company that sells instant noodles.
I always thought Jaehyuk's family is only in the middle class since they're running a restaurant by themselves. It looks like they're on the upper class after all, seeing their luxurious house and all. Maybe his father is rich? And his mother runs the restaurant