You were born in hell and as a demon you have been taught to never trust an angel and that they are bad.But after one incident, which is a day where you have been saved by an angel name Saint.He save you when you once got caught by human and made you their "play thing" as a "Hunting sports" on you. After that incident you have been following him everywhere.Even how much he try to get away from you,you always end up finding him in the end