The Return of The Disaster-Class Hero

There once was a hero who was deemed the strongest on Earth. “He's gone now. How would someone that died by our hands return?” “Yeah. I’d love to see the dead man try.” However, 20 years later, Lee Gun actually returns to the world! “Why are you guys so shocked? Did you do something that you feel guilty about?” ‘These motherfuckers. I’m not going to let them be.’