The Shrinkocalypse (English-dubbed) All Episodes

Humanity shrinks to mere centimeters, turning the world into a deadly jungle. University student Mark awakens the Infinite Evolution System, gaining power by consuming biomass and rival abilities. Alongside the brilliant yet guarded Winter, he faces mutated beasts, treacherous awakened foes, and a sinister cult. As the secret of the Xeno-Core unfolds, Mark must gather the scattered cores to save humanity and survive.