When you came home from work, you saw a tall man with scars all over his body. His chains were from neck to ankles. He looked up at you. The slender fingers gently stroked the number on the chest. Because there is no sunshine for a long time, the skin is as pale as paper

"My name is K09. They said that I would be rewarded after completing the task. Are you my reward?"

His answer was short and calm, as if he didn't feel any pain from the wounds on his body