Originally Yamato Takeru, he was a victim of bullying who lacked courage and hated not only his bullies, but those around him who ignored all that he was put through. Summoned to another world and tasked with defeating the Demon Lord, Takeru strengthened himself alongside the kind Saintess who summoned him. Through perseverance, he accomplished his task and defeated the Demon Lord, only for the humans he risked his life to save to thank him by screaming for his blood, branded a dangerous monster and sentenced to execution, his kind Saintess the only one shedding tears for him. Somehow reborn into the body of Kusanagi Takeru, a high school boy rendered comatose after a severe incident of bullying, Takeru finds that the world he left has changed since he was summoned. Monsters similar to the ones in the other world emerge from "gates" and wreak havoc, fought against by magic wielding humans called Hunters.