(I used Goo Hara for her looks, but the character is fictional).

Park Mi Young is a 17 year old girl, who lives in a huge mansion with her dad, who works as an police officer and is really rich. Her mom abandoned both of them when she was just a little kid, and her dad got re-married again when Mi Young was 14, but due to a sickness she died, leaving him in charge of her son also. He's got a mission to go undercover to catch a gang called Super Junior, so he has to change his name and move some where else, leaving Mi Young all alone, but her step brother, Daehyun has promised to take care of her until he comes back, along with his friends, B.A.P.

B.A.P is also a gang, but they haven't told Mi Young anything about that, but her father knows. He ignores it, because he promised Daehyun's mom to take care of him and he thinks of Daehyun as his real son. The rest of B.A.P are close to Mi Young as well, since they've known her since she was 14. Himchan has had a crush on her for a very long time, but he hasn't told her, because he doesn't want anything bad happening to her.

Another gang, Super Junior has gotten a mission from their boss to steal some money from a really rich guy. Most of them refuses to go, but eventually they agrees to do it. But the mission fails when they go to the house and realizes that B.A.P is there. They quickly leave, before B.A.P notices them, but one of the Super Junior members can't forget about Mi Young...