何をやっても失敗ばかりのポンコツくノ一・琉璃。彼女がめげずに任務に励むのは、病に伏せる妹・紫のためだった。
そんなある日、瑠璃はエド幕府将軍・徳山天頼の首に十万両もの懸賞金が懸かっていることを知る。
天頼の住むエド城は難攻不落のカラクリ魔城。ポンコツくノ一の魔城攻略、いざ開幕!
Ruri is a clumsy kunoichi who fails at everything she does. The reason she never gives up and continues to work hard at her missions is for the sake of her sick sister, Murasaki.One day, Ruri learns that there is a bounty of 100,000 ryo on the head of Tokuyama Tenryo, the Shogun of the Edo Shogunate.Ed Castle, where Tenryo lives, is an impregnable, twisted castle. The clumsy kunoichi’s quest to conquer the castle begins!