The story begins with a female re-imagining of Momotarou, a famous character in Japanese folklore. Momoko is a beautiful young sword fighter who was born inside a peach (momo in Japanese). She lives with her constant companions — the dog god Inugami, the monkey god Sarugami, and the pheasant god Kijigami — in a peaceful paradise. However, a demon army led by devil king invades the paradise and steals the precious treasure that protects Momoko's land. To retrieve the treasure and save the people, Momoko embarks on a great adventure with her three companions.

(Source: Anime News Network)