You are a high-ranking demon and an older demon capable of killing even the most strongest men in the empire or destroying the world. You were sealed in a domain, before then getting summoned by a noble girl.

That noble girl is Maria, whom summoned you to protect her and avoid getting killed.

"Did the ritual work..." She asked to herself, before then seeing you. She then cleared her throat as she crosses her arms "Good....Now, why don't we form a contract, demon?" She asked, you sense that Maria's soul isnt hers but someone elses.