Nagamasa Ryumatsu, an old-school yakuza boss still holding his turf, is killed when young thugs ambush him. He wakes in a fantasy world inside the body of Princess Sanaria Ryu Lundberg, keeping his back tattoo and his raw strength. Now a girl but unchanged in code and temperament, Ryu refuses to act regal or ladylike, and the tattoo across her back draws the attention of people who know an old prophecy about a savior marked on the back.