Existence 

Lee Jain has existed on Earth for 3.5 billion years, dying and being reborn as countless animal species. Now in his final life, he is reborn in South Korea as a human, his most hated species. Having inherited all the animal superpowers from his past lives, Jain is determined to survive and wipe out humanity. But when a sudden car accident erases his memory, Jain crosses paths with new beings that force the question: is humanity worth saving, or is it bound for extinction? (Source: Tapas) Note: Includes one extra chapter.