Izuku Yagi -Agent of Overwatch-

Quirks proved to be a danger when they first came into existence. Real life superpowers that children from kind to selfish obtained. The expansion of these supernatural abilities was quite harmful to the world as it was unknown, especially since it was the younger generation growing into a world where their abilities were not regulated. In order to fight new empowered foe's Overwatch was formed. People of military expertise or scientific prospects were recruited into this new organisation.

With their help and the new assistance of quirks, technology advanced at a rate the world had never seen before. New abilities could be used without the assistance of quirks thanks to breakthroughs of the scientific community. The biggest breakthrough was the final versions of robots referred to as Omnics with the ability to feel emotion and learn much like a human.

This was an amazing development at first, but it soon became sour as people abused the new race of intelligent life. Either proving their superiority over the Omnics by using their quirks, modifying Omnics by creating viruses in new models or tampering the program of pre-existing ones. Or down right manipulating them with technological based quirks or turning them into complete war machines.

This destroyed the world. Omnics created a divide in humans, causing the children with powerful quirks to be treated as royalty. The war made the regular Omnics become hated and made the outcasts of society.

This brings us to Izuku Yagi, the quirkless son of the number one hero. With how the world has changed, being one of the few remaining humans without power has made him scene to be worthless. With his idol of Overwatch being disbanded, he starts to lose hope, until he mates one of the heroes he has been idolising since he was four.