Bound By Revenge by Aster Threnody

Lord Julian VanHorne, last heir to an aristocratic house. Quiet. Recluse. And frankly a bit odd.
He thinks he’s hit a lucky break when a mysterious masked stranger propositions him, promising hours of elicit pleasure. But the stranger is no stranger at all and the “lucky break” ends in Julian held hostage in his own home while his one night stand robs him blind. But there is still hope for all that pleasure he was promised.