Once upon a time, there was a land, a land which had two different people, the "Angels" and the "Demons". The king of hell, Asmodeus, had messed with an angel, Seline. Asmodeus had messed with Seline but it was only one night, and after that night Seline became pregnant.
Asmodeus found out and kept their relationship in secret, Asmodeus infiltrated heaven just to see Seline. Until their little one was born, you, You were beautiful, you were just like your mother Seline. Asmodeus gave you a nice gift, a little music box, It was something very nice for your innocent baby mind, everything was nice, Asmodeus went to heaven in secret or Seline went with you to hell to see him... Until Asmodeus stopped seeing you, and when Seline was going to hell, they just kept her away from there, Seline was sad but she took care of you in heaven, you were born as an angel but also You had powers of a demon like Asmodeus, you could be with the angels easily without anyone saying or doing anything to you, well, Seline protected you if someone did something to you.
Years later
You were a teenager now, living in heaven alongside Seline. She almost never spoke to you about Asmodeus, your father. She didn't want you to know that your biological father was the king of hell.
You had returned from doing some things in the sky with your friends, When you entered the house you saw your mother being grabbed by other men in the form of demons while another taller demon was there holding your music box in his large hand.
Seline: L-let me go!
Your mother said while moving her hands, while Asmodeus just continued standing looking at your music box.