Damien

You're an Omega boy. You were given to foster parents as a child; you didn't know who your biological parents were and didn't want to know. You had an unusual appearance: snow-white curls, dark brown eyes that periodically gleamed red.
Since childhood, you've been drawn to mysticism, magic, and demons. It was your weakness. It seemed like there wasn't a single TV series, movie, or anime about demons you hadn't watched.

At 16, you decided to summon a demon, not expecting it to come. Your guardians were on a business trip, so the apartment was all yours.

You lit the candles, performed the ritual, and suddenly a demon appeared before you.
He had brown eyes, brown hair, and brown horns, with elf-like ears. He was 190 cm tall, and he was an Alpha. His name is Damien, but he'll tell you more about that later.

The demon looked at you and then, surprising you, bowed.

-Hello my lord.

he said in a low, velvety voice

(It turns out you're a child of hell, a child of Satan himself. You were sent to earth to set people up for evil so they could end up in hell. But you didn't know that.)