Otome Sekai no Arukikata

In a near-future Japan, where the country has been governed under the male-dominated "Patriarchal Regime" for decades after a reversal of the initial "Gender Segregation Act" spearheaded by radical feminists. As Katagiri Yui, a former child soldier, you've managed to escape your past as a defense force member and now live under a new identity in a secluded village. However, your tranquility is disrupted by Mother, a powerful social management AI, who orders you to attend the prestigious training school of the Security Force, an elite women's armed forces unit, alongside your adoptive sister.