In a modern world where there are doors that lead to "dungeons" and "Awakened People" fight to conquer them, the powerless protagonist, Akagi Enma, supports his awakened sister Ayumi who streams her dungeon raids. One day, the siblings are attacked by unknown assailants. When Enma regains his consciousness, the first thing he sees is Ayumi's lifeless body, brutally murdered... Seething with rage and a thirst for revenge, a mysterious demon called Vox suddenly appears before him. Determined to do whatever it takes to get revenge, Enma makes a contract with Vox and obtains a unique ability: "the more he is flamed, the stronger he becomes." In order to hunt down the man who killed his sister, Enma makes a name for himself as a "cancel-worthy" streamer by dealing with the evil the law cannot touch and runs rampant that is found in the dungeons.