After being expelled from his former school, Fudou Nomura enrolls at Aichi Coexistence Private Academy. Yet the institution is anything but ordinary: every female pupil wields a weapon! Under the leadership of five girls known as the Supreme Five Swords, they enforce discipline on male students by forcing them to cross‑dress and blend into the female cohort, or else they must leave the school.
On his inaugural day, Fudou meets one of the Swords, Rin Onigawara, who orders him to follow the dress code or depart. Unexpectedly, he resists and finds himself in a brutal clash with her. His combat prowess draws the attention of the remaining Swords, and Fudou must remain alert to survive their schemes at his new school.
