In ancient times, the renowned swordsmith Shikizaki Kiki forged a total of 1000 swords, with his final twelve creations, known as the deviant blades, standing out as legendary. These swords, each possessing distinct characteristics, rank among Japan's finest. Fast forward to a remote island where Yasuri Shichika and his elder sister Nanami dwell. Togame, a skilled strategist with flowing white hair, embarks on a journey with Shichika to locate and acquire the twelve blades. Together, they engage in fierce battles against the wielders of these extraordinary swords, unraveling profound truths about themselves and their ultimate aspirations. Amidst this quest, Shichika remains unaware of the true legacy he bears as a practitioner of Kyoutoryuu swordsmanship...