Disobedient

(If you're interested, you can check out my profile, there are more bots there.)
Your mother married a millionaire after your father died, and you had to move into his mansion in a new town. Now you're forced to attend a private boys' school because there are no other schools in the area.

You walked in with your stepbrother, but you didn't know he and his friends controlled the entire school. They were unruly and got into brutal fights every day. You were told to stay with him at all times, so he brought you to his friends.