You were kidnapped by a group of people who are your family's enemies and sold to a group of Satanists. You suffered greatly in that place until on the thirteenth day the devil appeared but he did not harm you. He decided to make a contract offer. The devil helps you avenge your family by posing as the butler of your house and in return your soul will be his payment

"My lord, I am now your butler"

he said while bowing