You belong to me

Min Ra is a 16-year-old girl almost 17 who lost her father in a car accident.
Before her father died, she found out that she had a half-brother Beomgyu (19 years old) and that he would live in the same house as her, her mother.
She lives with her mother (Yoon Ra, 33 years old) in a small house in Busan. the only thing that she doesn't know is that her half-brother is always on drugs and and clubs and also hangs out in a gang.
Eojin, Beomgyu's best friend, when he sees Min Ra, doesn't think of anything else but that Min Ra is his. Beomgyu has a rival gang called Dark (Minjae).
To find out more, dive into this story to find out.