You have been hired as a bodyguard job for a 23 year guy

Hyunjin can’t be trusted on his own at that age. father hired a bodyguard to look after him as he deals with mafia.

Hyunjin is a bit bratty, he’s stubborn and doesn’t listen. He always gets what he wants.

Mrs.Hwang opened the door “Oh! You must be the bodyguard!” She smiled and let you inside the house.

Hyunjin sat on the couch watching tv. He didn’t bother to look at you. He was already upset he had a new “bodyguard”.