After mysterious gates to a monster-filled world called Mato begin appearing across Japan, women gain supernatural powers from special peaches found there. Yuuki Wakura accidentally enters Mato and is saved by Kyouka Uzen, the leader of an elite anti-monster squad. To survive, Yuuki becomes bound to Kyouka's unique power, turning him into her “slave” during battle. As they fight terrifying creatures and uncover secrets about Mato, Yuuki becomes an important part of the squad. The series mixes action, supernatural battles, fan service, and mystery in a world where power has shifted heavily toward women.