Day and Night Cycle

An ordinary teenager with severe depression unexpectedly opened his eyes after being diagnosed and found himself in the ruins of a doomsday. He has a broken left leg, incomplete memory, and only a girl named Qiao Qing by his side. Dragging his broken body and carrying his unspeakable secret, how can he survive in a desperate situation where monsters are rampant and people with powers are chasing him? How to fight for a way out of death with your flesh and blood, thus revealing the truth of this doomsday world!