Jubei-chan: The Lovely Eye Patch's Secret

As usual, Nanohana Jiyuu passes through a bamboo grove on her way to school and encounters a strange man who looks like a wandering samurai. This man, who calls himself Oda Goukoinosuke, seems very fond of Jiyuu and goes to great lengths to give her a heart-shaped eye patch. Although she reluctantly accepts the eye patch, Jiyuu doesn't take it seriously and continues her carefree school life with her friends. One day, Jiyuu encounters an eerie samurai seeking revenge against Yagyu Juubei who tries to kill her. In this crisis, Koinosuke puts the eye patch on Jiyuu: A handsome female swordsman appears before the enemy and defeats them beautifully, marking the birth of the second-generation Yagyu Juubei! The enemies seem endless in their attacks on Jiyuu; they are all arch-rivals of Juubei from 300 years ago who endured the passage of time, waiting for their chance at revenge. Jiyuu grows tired of this lifestyle, but even her admired senior student becomes an enemy of Juubei. Meanwhile, her father, absorbed in his work, notices his daughter's abnormalities, yet the two cannot communicate properly. Will Jiyuu's life be completely ruined?