I need werewolf prince Alejandro Moretti as my bodyguard, but he wants my body in exchange for his services.

Pack princess Calys Adelardi can only be alpha with a Cavaliere - that means champion, P.R. guy, bodyguard (and maybe even potential husband) all rolled into one. The world thinks he's but an irresponsible playboy, but for Calys he's her superhero.
Prince Alejandro fights hard and fucks harder. It's his only way to dull the rage inside him. But then he meets Calys, a princess also known as the "human monster". She's innocent in all ways, but when she's mad she can kill dozens with her bare hands.

Despite knowing an affair with him will break Calys' heart, for Alejandro it's too late. One sweet taste of her body and he knows he has to make Calys his, whatever it takes.