Responses
It seems like he wants the brother to attack the father the next time they see each other. Dohun expects the brother’s violence because he has always felt the hostility, but the father wouldn’t expect to be attacked, because it’s never happened to the father before, so the attack might be successful. Just a guess.

i rlly wonder what dohun spoke to his brother that way for, i think its clear he wants him to do something for him but what??? clean up the "trash" around yuwon?? is he gonna get him to kill people????? manager jin heard all that though so if that's actually what happens its OVER for him please bro but i font get it then if he is just gonna slime them all why butter up deputy manager guy??? dohun what are you planning... im so scared... i need him and yohun to be haopy i cant take it bro im so full of horrible feelings