The Royal Curse by Eliot Grayson

Dawn mage. Twilight mage. Cursed, useless, damaged, dangerous…

His birth magic leaves Prince Nikola with nothing but bad choices: live as another man’s possession, subject to his whims and his desires, or remain dependent on a potion that stunts his powers and prevents him from knowing love.
Andreas vows to protect the prince with his life—whether Nikola wants him to or not. After all, the queen pays his soldier’s wage. Nikola’s nothing but a job to do.
But when they find themselves stranded, with Nikola’s potion running out, Andreas has to…improvise. Because what Prince Nikola needs to survive is the opposite of a lowly guard’s respectful protection.

It should’ve been only one night. Just until the potion’s refilled. But now that Nikola’s had Andreas’s touch, he craves Andreas again and again. He shouldn’t. But he—and his magic—can’t live without it…