Angel's Conquest. Elemental Angels, #6

She's a lycan princess in desperate need of a competitor to win her hand. He's the only one who can fight for her, except he's sworn an oath to another. Bronze could only kill so many demons in a night before even he, a fallen sentinel angel, got bored at work. So, when he comes across an unconscious exquisite woman on his watch, it doesn't take long for things to get interesting. Especially when the woman possesses a relic that would not only end the demon war, but enable him to finally fulfill a sacred vow that's tormented him for eons. For Clara Ander, what's more cliché than a runaway bride? A runaway lycan princess who'd rather take her chances with an unknown male than be mated off to a lycan warlord of her brutal father's choosing.
But hidden away in her cloistered conclave, she isn't prepared for the fallen angel who has her questioning everything she knows about fate and her own power. With thoughts of finally ending the war and fulfilling his oath rivaling his deepening passion for Clara, Bronze agrees to enter the Betrothal Games: a series of contests whereby the winner gains Clara's hand in marriage .