Choi Hyun-seok, a heavyweight champion of the biggest mixed martial arts league on Earth and the one who was called the strongest had died. Afterwards, he was granted new life as a hero in another world. ‘Wealth! Honor! Endless beauties at your fingertips!’ With thoughts of such a dazzling future, the first thing that he saw when he came to this new world was a towering ox monster. The monster, who was the commander of the demon army, asked. “Hero? You’re saying you’re the hero?” “Uh…I think…?” And so, that was the start of hell.