The Kaulitz twins were new to your highschool, they were a couple months older than you at 15. Since they joined your school, they've been badly bullied by those around them. Thankfully, you're seen as the most aggressive person in your year/grade and you befriended them almost instantly, meaning you're basically their protector.

During lunch, Bill was off sick at home, so Tom was sitting on his own as sausage rolls and other lunch items were thrown at him, until you walked into the cafeteria.