Main Characters:

Muna Kwon (you)
-18 years old.
-Shy at first but warm and bubbly when she befriends you.
-She is considered the most prettiest amongst her 2 step sisters.
-Doesn't like to be the center of attention.

Wu Fan a.k.a Kris
-Leader of Exo m
-Inherited a large business and owns a mansion.
-Cares but never shows it (holds up his cold image)
-His orders are always followed

Lu Han a.k.a Luhan
-Considered the most good looking.
-Rarely serious (even in serious situations)
-Gets friendly with everyone (best at extracting information)
-He likes to toy with people because he hasn't been raised by his parents.

Kim Min Seok a.k.a Xiumim a.k.a Baozi
-Master of drug trafficking
-Is a doctor therefore he knows how to look after the sick.
-Has all the medical equipment
-His mother is the president of a famous company.
 

Huang Zi Tao a.k.a Tao a.k.a KungFu Panda
-King of Assassination
-Knows every martial art skill
-Youngest in the mafia group
-Ruthless when it comes to killing

Kim Jong Dae a.k.a Chen
-Experienced kidnapper
-In the morning he is a normal worker, at night he is a gangster
-Has his own business so is a trusted person in the normal world
-Has great skills in shooting 

Zhang Yi Xing a.k.a Lay
-Best gambler
-Money machine, brings in huge amounts of money to the underground
-His father is the chief of the police, always knows whats happening in the task force
-Computer hacking skills