The blockbuster epic game “Nation War, Crisis,” features two heroes and describes the Great War of the Principality of Arikreth and Kingdom of Burgas. Tetsuya Kuga, who works at a black company, dies of exhaustion from overwork after playing the game while his daily exhaustion is building up. When he wakes up next, he is reborn as a boy named Kaim-Rowen in the game world. However, he is reborn as a mob character on the villain’s side whose name does not even appear in the main story, rather than as a hero or a last boss! Moreover, his subordinates in the main story were used by the last boss, and then abandoned and killed with the same fate. ……? “Damn it!　I won’t die!” Kaim decides to work hard to avoid being killed. Thanks to his hard work, Kaim gained extraordinary magical power and ability, and with his knowledge of the original story, he was able to rescue those who were destined to be killed one after another and rise to become the head of a major organization! This is the story of a villainous mob that was doomed to die, but rose to become the strongest by taking the last boss’s place.