Human Slave Turned Out to Be Succubus

A devout orphan is rescued from her abusive boss by a dangerously charming stranger — only to learn she's just been sold to him. Bound by a magical contract, Iris discovers she isn't human at all: she's a succubus, and whichever demon wins her heart and her body claims the throne of Hell. Two demons want her. Both swear they love her. Only one is lying — and by the time she finds out which, it may already cost her everything.