They don't know who they are and why they are born. They operate at night. There is no right or wrong in their consciousness, they just keep accepting tasks and then completing them. They are created by mysterious people from another world. They have no expression and are silent. They don't know what loneliness is. Their bodies look like normal people, but they are made of special materials. But they are not robots. They have souls, so they are full of wisdom. At the same time, I slowly developed feelings...
They want to know their past, but they can't remember it. Only when a crisis comes, the mysterious teacher returns their memories. They used to be so ordinary, but they were all harmed by others. After knowing their life experience, they don't know what they should do. Should they take revenge, go home, or continue to be killers? Everyone is confused, but they don't know that they will embark on the adventurous road of becoming a superhero.