There was the girl with a bloody sword in the Warring States period
Long time ago, there was the girl born in a small country at war.
Her father was a daimyo, a feudal lord, and her brother was the heir.
However, her brother was a sickly child, so it's too hard to fight at the battle front.
His sister Tomoe, who was endowed with a military talent, disguised himself and became a sword‘man’.