Started with a fan sign

There was a girl named PARK CHAE MIN she is a bad girl , her parents left her when she was 4 and they said she has a brother but she never met him ... She was adopted that's why her surname is PARK and also she has her gang , her best friends since kinder ......one day THEY fought with someone and they accidentally went to BTS's fan sign event... Hmm I wonder what will happen ... Will there be a happy ending? Will there be a love story? Will chae min find her brother?........well read this story to find out . oh and by the way this story will be taglish