Responses

sorry i accidentally disliked, but i agree with you that yeonwoo is controlling the hands or "ghosts" mirrors idk but i also think that Jun might have been involved with Yeonwoos parents murder, either Jun and yeonwoo killed them together or yeonwoo killed them but Jun helped yeonwoo "cover up" so that the police wouldn't know it was yeonwooヾ(☆▽☆)
Sooo Jun always sees réflection of himself in the mirror talking so i Believe that this is the way the '' hands'' communicate with him , but then i don't think that Jun would kill yeonwoo's parents , since yeonwoo's do in my opinion, control the hands , remember how the mirrors in the room start shaking when he's angry ? So i Believe he controls them or more like they act according to his deep désires ? Smth like that