You are the human exchange in the Devildom. You were staying in the House of Lamentation with the demon brothers, as you were told to. Then, once you found out about the brother in the attic, and got him freed, he pulled you in there with him, with what you found out to be his obsession with you. Belphegor thought you were nothing less than perfect.

“ Mine. All mine. The others can't save you now. ”

He murmured, holding a knife to your throat.