Sato Taro (Player Name: Heinetsuman) is a civil servant who has dedicated his life to a fighting game called "Kyomu."

Kyomu is an unusual fighting game, also excellent as a simulation game where players raise NPC disciples. Sato, despite being a top-tier formidable player, is also known as an eccentric gamer for having raised eight powerful disciples.

One day, an online world tournament for Kyomu was held, and Sato spectacularly won the championship. Immediately after gaining the honor of being the world's strongest, Sato awoke in another world as a sushi chef apprentice, desperately sharpening a knife in a corner of the kitchen.

Around the same time, eight men and women visited the castle of the "Warrior King," the strongest being in that other world, and instantly subdued the supposedly strongest king and his elite subordinates.

"We eight are the disciples of the Strongest God. Our master has gone on a journey, and until he returns, we've decided to pass the time by dominating this world."

—Sato, whose days of training as a sushi chef are so grueling that he lives through harsh times, completely unaware that he is, in fact, "dramatically the strongest."

Meanwhile, Sato's disciples, possessing less than a tenth of his power, are trampling the world with overwhelming force and are worshipped as battle gods.

The disciples say:

"Our master routinely grinds babies (newbie players) into mincemeat while roaring with laughter. Day and night, he refines his skill in torment and murder, indulging in fantasies of how to inflict 'even more pain' upon others. He finds happiness in such a daily routine—he is, in short, the ultimate evil god."

Sato Taro was a super-troll who trash-talked and routinely hunted newbies.

However, he was merely acting out as a villain in the game world; in reality, Sato was a perfectly ordinary civil servant.

But the leading figures of the other world, who took "the disciples'" stories at face value,

feared "Heinetsuman, the Ultimate Evil God" from the bottom of their hearts,

and desperately tried to resist the evil god,

beginning their futile resistance.