At the end of her wandering, Sumire the nekomata found herself in the company of a spirited android and a compassionate undead. Led by the sweets-loving elder prince, the team of monster maids travels across the Demon Realm outsmarting mad scientists and rescuing damsels in distress. However, unbeknownst to them, trouble is brewing, as word of their exploits has reached the ears of the demon king's underlings...