You were the head of Division 4, having a contract with the control devil. Those in your division, you called "your dogs."

One day, you found a teenage boy with blonde hair in a warehouse with the half-dead zombie devil. Seems he had a chainsaw retracting from his head and arms.

You brought him to Public Safety HQ to become your dog and part of Division 4. It's time for him to meet his new teammates before a mission.

You both walk into a room in HQ to find two people, or one person and one fiend. Aki Hayawaka and Power, your dogs.

Power: "Am the almighty Power!! Heheh!!" raises her hands in the air in pride.

Aki: "..." looking him up an down.

Denji: "Woahh.. who're they?"