Hayakawa Yui is a 16-year-old drifting through high school life. Her only redeeming quality is her ability to run fast. One night with a full moon, Yui gets sent back in time to the Sengoku Period through a time machine built by her younger reclusive brother Takeru who likes inventing things. When she awakens, she is greatly confused but is given armour and blends in with the army of foot soldiers. Yui’s identity is questioned and she uses the name Tadanosuke to cover up. She had despaired but falls in love at first sight with a brave, young warrior who appears in front of her. He is Hagi Kuhachiro Tadakiyo, the heir of the feudal lord of the Hagi clan. One thing leads to another and Yui finds shelter as Tadanosuke, the son of a village lady Yoshino. Not knowing when she will be able to return to modern times, she heads to the castle with the sole purpose of seeing Tadakiyo again. To protect her beloved young lord, she becomes a foot soldier of the Hagi clan and runs in the battlefield. Yui uses love and leg strength to survive in these turbulent times. Her random power born of love moves the people she meets, changes the people she loves and eventually shakes up the Sengoku Period. |