After fleeing their master's dojo, Kimi and Hana must navigate a treacherous landscape to reunite with their surviving family while evading their murderous uncle. The sisters, having trained in secret as boys to master the sword, now face the reality of their precarious situation following the death of their mentor. They are pursued by their uncle, who seeks to eliminate them to secure his position, forcing the protagonists to rely on their combat training and the loyalty of their friend Tatsuya. The narrative follows their physical movement across a hostile environment, emphasizing the tactical challenges of survival and the psychological weight of their quest for vengeance.

Readers frequently highlight the fast-paced nature of the narrative and the focus on martial arts training. Discussion often centers on the sisters' internal conflict regarding their dual identities and the moral implications of their quest for revenge. Critics note the effectiveness of the atmospheric world-building, which emphasizes the harsh realities of the period. The balance between action sequences and character development is often praised for keeping the plot moving without sacrificing the emotional stakes of the protagonists' mission. Many readers appreciate the clear stakes established early in the series and the consistent tension maintained throughout the hunt for the missing family members.