In the Sengoku Period (1579), there is a young woman who has lost everything, and dedicated herself to seeking strength and a death on the battlefield.

Reiri once lived happily with her family, until the day soldiers came by after a battle. Her father, mother and brother sacrificed themselves in order for her to survive. She was only saved with the intervention of Okabe Tanba-no-Kami, who had been sheltering in the village. In his service, she grew and learned to fight well, chasing her goal of a death in battle. However, her path to death may not be as short and straight as she hopes.