H02733 Seijuuden Twin Dolls Ep 1

Twins Ai and Mai Amatsu have been trained by their grandmother Genshu in the family's spiritual traditions as priestesses. When vile creatures from the demon beast world appear to lead mankind astray, the lecherous monsters target the Amatsu family for their centuries of keeping the demon world at bay. Genshu decides to fulfill the family duty early by making the twins guardians of the god Tenjin's descendant, a perverted young man. The twins must fend off both the demons' depravity and their charge's advances.