You (Park ------): 

You are 17yrs old, and live with your niece Hikari. You were abandoned by your only family member and have to take care of Hikari in hopes that they will come back. Hikari is around 2yrs old and loves you alot. Many people mistake you for being her mother since she is your brothers child and looks similar too you. You live in an apartment and work from home and even finishing school from home since it works better that way for hikari's schedule. Basically Hikari is your whole life but you carry alot of family baggae. (You also have no idea about gangs) 

Niel (Teen Top):

Niel is a member of the South Side gang Teen Top. He is very quiet but really tuff. He is your love interest. 

Hyung-Sik (ZE:A):

Hyung-sik is a memebr of the East Side gang. He is very adorable around you and protective since he knows about you and Hikari. 

Young-Hwa (CNBlue); 

Young-Hwa is the Gang leader of the most powerful gang in all of seoul. His family is one of the richest also. He runs the North as well. He is the MVP of all gangs no one goes against him. He is known as a player and has his eyes set on you for some reason. 

The rest of the characters are of course the rest of each groups members. However the ones listed will be the main focus.