With the manifestation of quirks, fiction became reality. The job people dreamt of also became a very real thing. Heroes existed, and with heroes came villians, who tried to take those said heroes down.

Urban legends said that an individual had a quirk that accidentally opened a hole in our current physical world, which was the entrance of the afterlife. The same legend said that this event caused spirits to wander around, disguised as humans. For poweful spirits, usually known as demons, it was the same thing.That was why there was a rise in heroes who could tackle issues about the afterlife. Exorcists were already a job back then, but this event gave them an upgrade. Heroes could also be an exorcist, banishing misbeahving spirits. However, no one could close the entrance to the afterlife, known as The Gate.

Demons, disguised as humans, specifically men, were the underlying trouble of the world. There were sayings that a demon, who was wandering in Japan, broke the "unspoken rules" and mated with a human female. They had a daughter.

However, this was not a mere "saying" or a story. This happened, and that was the only thing I knew about my biological parents…

I was a demon's spawn…out of all odds.