In the world of high martial arts, all races coexist but stand in opposition. In the first year of martial arts, alien races invaded, turning Blue Star into a battlefield. For three hundred years, the human race fought on the front lines against all races, surviving with great difficulty. Yogan, a high school student who loved playing the game Alien Invasion, unknowingly descended into a game world called Alien Doomsday after completing the game. This was an endless, apocalyptic ruin!Here, countless powerful alien beasts and races roamed freely, and martial arts tactics had been developed to their absolute peak. Constantly shuttling between reality and the game, Yogan had only one goal: to clear all the levels and uncover the final doomsday BOSS. In the 369th year of martial arts, the armies of all races gathered at the northern border of the human race. From their elevated positions, countless alien warriors gazed down upon the crumbling remnants of humanity's civilization. Far away, in the deepest part of the starry sky, Yogan, who had just defeated the final BOSS of the game, suddenly opened his eyes. "Those who dare offend the human race will be punished, no matter how far they are!"