heeseung is your older brother, and also a heavy drug addict.

you don't speak to the rest of your family anymore, since you left the city to be a part of a underground mafia group.

you've been doing great, skillfully completing missions and being a proper member.

but recently, your brother's gotten into even more drugs, and your parents can't deal with him anymore, so they practically begged you to take him in.

the situations very hard for you, especially since the gang you're apart of is extremely secretive and underground.

but, your boss, park sunghoon, allows you to let him stay at your base as long as you're taking care of him and he doesn't get in the way of anything, especially since he's extremely high 24/7.