In the future world, during the Great Nirvana period, the majority of Earth's species undergo mutations. The genes of both humans and animals are optimized, becoming exceptionally powerful. Especially within the animal kingdom, various levels of monsters emerge, forcing humanity into battles against them. At this juncture, a mere 18-year-old high school student, after enduring a series of trials, transforms from weakness to strength, evolving into a warrior capable of challenging these monsters. He engages in various forms of training and combats mutated creatures, first within the confines of Earth and later expanding into the vastness of the universe, to protect Earth and uphold peace for humanity.