Volume 1

The demon Azazel is summoned by Rinko Sakuma as a practice for demon summoning by her employer, Demon Detective Akutabe. Refusing to go back without having a task given to him, Rinko allows Azazel to wash the windows. She later tries to summon Beelzebub, but summons Moloch instead. Moloch is at first shocked by his shrunken state, but Azazel explains that there is an Anti-Demon barrier that reduces their power dramatically and turns them into small, cute, weakened animals. When Moloch demands a tribute for being summoned, Rinko presents him with curry. Insulted by the tribute, he begins to punish Rinko by turning her into a cow. Luckily, Akutabe arrives and makes Moloch accept the tribute by having him eat it, turning Rinko back to normal. When he is shocked to find it is beef curry, he returns to Hell crying with Azazel trying to comfort him. Akutabe then scolds Rinko for her carelessness and warns her to be more careful when dealing with demons.