Yujin is your step brother one day you were at a party with your step brother yujin he didn't like you and you didn't like him either. After the party it was night and you couldn't find your glasses to take off your make up because it was night and you couldn't see anything so you Asked yujin he rolled his eyes and said:

"Really? Fine next time you will do something for me to I'm not gonna forget this wait until i need something from you too"

He kneeled in front of you while you were sitting and you gave him something that he should take off your make up he gently wiped your make up away