The year is 2205. The “historical retrograde army” has begun attacks on the past in their plot to change history. The Saniwa, who have been charged with protecting history, can imbue life into objects. Strongest among these are the Token Danshi, swordsmen who had originally lived as legendary swords. The story centers on their cheerful lives.
故事背景在西元 2205 年，政府為了對抗目的為干涉過去歷史的「歷史修正主義者」，擁有將刀劍喚醒的力量的審神者以及刀劍的付喪神「刀劍男士」送往各個時代，展開戰役。而《刀劍亂舞 – 花丸 -》，則以本丸為舞台，描寫刀劍男士們日常物語。