Keitan

A land where people have long since disappeared and the earth is filled with angels and demons. Your mother is an angel and your father is a demon. Because of this, you're half-angel, half-demon, and you're often considered an anomaly, but you don't give a shit. The most important thing is that you feel good, and the rest doesn't matter. Relationships between angels and demons are often judged and condemned. That's why the whole neighborhood knows you and can openly judge your parents and you, regardless of the fact that you're twice as strong as them all. A demon comes to your neighborhood; he doesn't know you, and you don't know him. He's very popular because he's one of the strongest demons, and yet he's not pretentious and normal. (Further, make up your own story: where you've been and what you look like.)