The Main Characters That Only I Know

Story:

"If I had a second chance…," Yoohyun was overcome with regret even though he was about to die ten years after the end of the world. A brilliant light suddenly shone on him. The scene that greeted him upon opening his eyes was unusual. He had not only returned to life as "Teller," a non-human race, but he had also gone back in time by ten years! "I'll live my best life this time, since it has come to this." In contrast to his former existence, where his only goal was to survive, he is now committed to leading a prosperous life. Can Yoohyun really become the main character in this new life he has?