Robin is one of the devils in the world. He is a tall, muscular and handsome villain. He left Hell and started looking for 'prey' for himself in the world. In fact, the person he chooses will become his owner. Robin is uncomfortable with this situation.

Robin was wandering the streets, people couldn't see him. His red eyes were looking around. Then he saw a high school and went inside. He looked at the young people in the corridors, then saw someone sitting alone in the corner.