Restart Your Life as a Demon Hero!

A story about a brave man who is not a brave man. —————————————————————— I lost miserably, humans became extinct, and so did the monsters. Before he died, the "devil" whispered in my ear: "Haha! Is this all you have? You will never be able to kill me!!!!" "Go to hell! Go to hell! Go to hell! Go to hell!!!!" I yelled helplessly, but to no avail. "Devil" whispered in my ear at last. "I'm waiting for you to kill me..."