I need someone to answer me

can y'all tell me the title of that one yaoi manhwa uhm... it's about an Incubus half human and a priest, I think? and this incubus-human met the priest when he was about to check out a dungeon and the priest got suck up by a sand and boom, they're both in the dungeon. and this demon prince who turned into a cat because he lost his power was the Incubus-human's contractor. the demon cat promised to give some of his powers to the incubus-human.it's a Korean manhwa... I read it in here and the incubus-human purple hair and the priest has blond hair. Both of them look like a twink TvT