The ship that little Fena was aboard was boarded ten years ago. Her father passed away around this time, and her close friend Yukimaru vanished into thin air after taking a small rowboat off the coast. She has since been residing on a small island where the men wear the trousers, have total control over the ladies, and are allowed to do whatever they want. For a very long period, Fena considered running away, but it never happened.
But one day, Otto and Salman, who have been helping Fena since she was a young child, show up in front of her. Now that they are in control, they seize a ship and successfully make their getaway on board. But as they flee, they rapidly understand that they are not alone: Helping them emerge from the shadows is a group known as Samurai Seven, lead by an enigmatic samurai. The three take shelter with the group, and Fena explains their destination: before he passed away, Fena's father pleaded with her to discover a place called Eden, and the Samurai Seven are accompanying her on this journey.