The protagonist is an ordinary time traveler. Her job is to complete various tasks, but one day she lost herself. She was looking for herself. She met many people and many things. She liked them and wanted to protect them, but she couldn't do it after all. The world was sick, and she was just an ordinary time traveler. How could she be able to do it? So she saved the world with her own life in exchange for everyone's lives
Intention: A person's power is limited, but we are more than one person