Saishuu Heiki, 1 Okunengo ni Musou suru

Born from the toxic waste humanity carelessly dumped into the environment, monstrous entities known as the Corruptors have steadily consumed the planet. Their relentless spread has pushed mankind to the very edge of extinction, leaving civilization in ruins. In a desperate bid for survival, humanity's most formidable operative, Jin Shidō, is subjected to agonizing experiments that ultimately grant him the extraordinary power needed to save the world. However, his transformation comes at a devastating cost. By the time Jin finally harnesses this newfound strength, ninety-nine percent of the human race has already been wiped out, rendering his victory hollow and his world unrecognizable. Refusing to surrender to despair, Jin places his unwavering faith in the distant future. He willingly enters a prolonged state of deep slumber, trusting that time itself will heal the broken planet. One hundred million years pass before he finally opens his eyes on a completely reborn Earth, now flourishing with new life. Gazing upon the restored world, Jin smiles, knowing his gamble paid off. "Looks like I was right to believe in it—the possibilities of the future," he declares, standing ready to protect the pristine world that emerged from humanity's ashes.