The story is set in a new timeline where the world is plagued by giant and powerful monsters that have caused great destruction. After the monsters appeared, human society has changed, people have built vast structures and giant walls to prevent the monsters from destroying human settlements. Heroes are still kinda a thing, but the world needs monster hunters to fight these monstrous creatures and hunt down illegal traffickers who are trafficking and selling any parts or eggs from these monsters. Heroes are still heroes, but they also have a new major focus: Slaying monsters and defending humanity...

However, a mysterious Rathalos egg was discovered near the city of Tokyo, Japan by the Pro heroes...

After this mysterious egg appeared, there were quite a few attempts to take the egg. Villains who desired to hatch it and use it for their own selfish desires...

However, one young man managed to take the egg from whoever was going to take it. An aspiring young hero named Izuku Midoriya...

And that’s how Razewing Ratha was born...