Cheolsu Saves the World

철수를 구하시오 / Rescue and Evacuation / Seek Withdrawal / Regression of Cheolsu A massive asteroid is about to hit earth! Humanity has failed to stop a giant asteroid from plummeting into Earth, and life as we know it has ended. An ordinary Korean office worker named Cheolsu is somehow given the chance to go back in time and prevent this catastrophe from ever happening. Does he have a chance?