――Spring, 21XX. Japan has fallen to radical feminism. Under the "Gender Isolation Act," male infants are taken at birth to military facilities. Their fate? Become soldiers for endless wars. With men branded savage and cast aside, society blooms into a maiden's utopia - of women, by women, for women! Yet one boy walks this twisted utopia in secret. Once a Defense Force cadet, he slipped through the cracks to a quiet, remote village life, forged papers hiding him with his adoptive mother and sister. Until "Mother" - the AI-running society - summons him to the Security Force training school. His adoptive sister volunteers to follow, and together, they step into the city - still a dazzling garden despite its decay. Masquerading at the all-girls academy, he finds himself rooming with Akari, whose gentle heart knows no guile. Between tough training and watchful seniors, something deeper than friendship takes root. But in a world that hunts men like wolves, where extremists howl for male extinction, there's no telling what horrors await if his secret slips. After all, even sweet Akari declares: "My dream is to exterminate all men!"