Psychomachia

In the afterlife, if you're an angel, you can choose from a few career paths; you can guard people and protect them from harm, you can take quick jobs "possessing" them to do something extraordinary, or you can take up a lifelong contract to watch over them and try to shape them into the best person they can be!

If you're a demon, you can guide people as well— to worse things. And you can possess them, but this is rarely taken seriously, so demons usually just have fun with this. AND you can take up a lifelong contract trying to get people to be the crappiest person they can be!

With the demons' focus on population control, they're constantly opposing the angels, whose goal is the exact opposite. That's why nobody ever thought that a demon and an angel could be in a relationship, let alone have a child. Stories— cautionary tales are told to children about the horrific creature this would unleash upon the world, but then it happened.

And when that child comes of age, how in the entire heck is he supposed to be employable?