jaeho already said multiple times that he didn't want to inherit the company, but liu didn't listen. so he acts like a jerk to scare liu away and get him to quit (so that he would leave jaeho alone). it doesn't have anything to do with the relationship between jaeho's father and liu, and he's not jealous either lol.
And u have to understand that he doesn’t wanna take anyth8ng from a man who he feels is responsible for his moms drug addiction or at least played a big role to him it’s like he had this big company and money yet he left his son and his sons wife to struggle just to give the company to him
The seme is a jerk this relationship is confusing i know he does because he’s angry to have that job but is it because of his dad? Does he mistreat the uke just cuz he was his dads secretary? Is he jealous?