Traversing the world with a single objective, Rushuna, the attractive blonde Senshi gifted in the art of firearms, seeks to promote serenity not through violence, but with sheer warmth as she plants smiles on the faces of all with whom she interacts. Even though she abhors aggression, she exhibits immense aptitude with guns when the need arises. Along her path, she encounters Yajiro, a warrior who wields a sword and offers his services as a Mercenary, eventually accompanying her on her mission.