Hero Has Returned

After rescuing one realm, hero Minsu Kim returns to Earth only to discover that he has lost everything… so he resolves to destroy the world he once called home. During his rampage, he takes the lives of teenager Jeongsu Park and his family. However, instead of perishing in the usual manner, Jeongsu is transported to another world where he realizes he has become a hero himself. After vanquishing the demon king of this alternative realm and refining his skills as a hero, Jeongsu comes back to Earth, driven by an unwavering desire for vengeance against Minsu. As the two heroes clash, with the destiny of their nation hanging in the balance, who will emerge triumphant?