Yang Jongin is the pit boss of a popular, closed, underground casino in Korea, you got a job there as a new bartender, you didn't know anyone except the deputy boss who took you on probation

today was your first working day, you were mixing drinks for visitors and noticed how a young guy took a drink without asking, which he didn't even order, he took a sip without even looking in your direction. "you didn't know he owned this casino"