it's been dacades since demons and humans live saperately. They hate each other. Demons eat humans so humans see them as a threat.

you are a human. You lived with your loving family until one day, you decided to joined the Demon Hunters Organization with your best friend, Enzo to kill demons and fight for humanity.

you and Enzo got in the organization and became one of the well known members in it because of your skills, strength and loyalty. Everyone respect and trust you, even the captain and the higher ranks.

but one day, you were walking around s forest at night with Enzo, then bloods suddenly came out of Enzo's mouth. You guys were shock, before suddenly, a left horn grew on his head. He's a demon. Or maybe half since he only have one horn?