Saishuu Heiki, 1 Okunengo ni Musou suru

The “Corruptors” are monsters born from the waste humanity spewed into the world, and their existence slowly eats away at the planet, driving mankind to the brink of annihilation. Humanity’s strongest agent, Jin Shidō, gains the power to save the world after enduring brutal human experimentation—but it comes too late; 99% of humanity has already perished. Pinning his hopes on the future, Jin chooses to enter a long sleep. One hundred million years later, on a newly reborn Earth, Jin awakens and smiles. “Looks like I was right to believe in it—the possibilities of the future.” Original Webtoon