Rushuna walks into every fight she doesn't want to have and shoots her way out of it with a smile that's somehow not ironic. The show knows exactly what it is: a blonde woman with impossible gun skills and a philosophy nobody believes until she proves it works, paired with a cynical swordsman who can't figure out if he's protecting her or following her. It's silly enough to be fun, competent enough at action to earn the silliness, and committed enough to its weirdest idea, that kindness is a weapon, that you stop laughing and start watching.

Rushuna wanders across war-torn lands as a skilled gunslinger with an unusual mission: she believes that genuine smiles can dissolve conflict better than any weapon ever could. Set during Japan's era of civil war, the story has her crossing the country in search of a way to end the fighting by taking away people's desire to fight. She would rather not fight at all, yet she is pushed into battle again and again, and there she shows remarkable skill with her revolver, including a knack for reloading in the middle of the action. Along the way she rescues Yajirou, a sword-wielding samurai for hire cornered by an enemy army, and he joins her on the road. Together they take on a long line of opponents, his blade alongside her gun, in a series that mixes action and adventure with comedy and ecchi.