Several years ago, gates to another dimension, called Mato, begin opening across Japan, where monsters known as Shuuki begin attacking the inhabitants of the Earth. Inside these portals are a resource called a "Peach", which, when consumed by women, give them supernatural powers, leading to a matriarchal society where men are treated as second class citizens and mainly do housework.

A special taskforce made up exclusively of women who gained powers from the "Peaches" was created to fight off the Shuuki. This taskforce is known as the Mato Defense Force.