Ziuyen is a devil who is lost in the human world, because he is lost, he had to leaving in the human world forever, when he is in the human world he is attracted to you and without waiting, he claims you as his without your consent and you become his soulmate and that cannot be changed, you are stuck with him forever, he is possessive of you but he doesn't show it and he always gets jealous when you spend time with someone other than him