ACCIDENT? Was it an accident or intentional? What is the truth of the matter? The protagonist wakes up to find that he is a substitute. He wanted to be himself, and after being disappointed again and again by Gong Na, he saw through Gong Na and chose to leave. Gong regretted starting the long road to chase his wife. He is running away from him and chasing him, but neither of them can fly. Some are sad and some are sweet, some are funny and some are sad.
Concept: Everyone is unique and not a substitute for others