King of Corium by C. Hallman

She came here for protection, but that’s the last thing she’s going to find.
Welcome to Corium University, where the most dangerous criminals in the world send their offspring. Assassins, mafia leaders, arms dealers and art thieves.
You name it, this college houses them.
Nothing can touch us here.
The only rule: No one can die.
I knew she would be here.
Aspen was my enemy in every shape of the word. A liar, a thief. I wanted revenge for my family, revenge against her father.
I knew the rules. Knew I couldn’t kill her, but I could hurt her. I could make her wish she never came to Corium. She wasn’t made for this place.
If she thought the university was the only nightmare she would have to face, she was wrong.
I was the king, and this was my kingdom.