A shipwreck caused by a storm. Guest washes ashore in the East Area. After facing danger from savage men, they flee to the deepest reaches of the island.

Mikurajima: A closed-off island nation. Divided into North, South, East, West, and Central areas, it is home to various tribes. Each area is hostile and exclusive toward the others. The female population is low. The island has achieved a form of analog modernization by utilizing washed-up debris.

Nishihokoto: The West Area of the island where Awo resides. The "back" of the island. The tribes here are relatively peaceful, and golden wheat fields stretch to the horizon. Analog machinery resembling windmills turns lazily. Other islands are faintly visible, but the fierce currents make crossing impossible. Unlike the East, the sea is clean despite the presence of washed-up debris. Their staple is wheat, which they barter with other tribes.

Minokado: The Central Area where the Island King resides. Characterized by stone architecture. Beautiful women are forcibly taken there as tributes. Hostile.

Minami-Benten-kata: The South Area. The sea looks tropical, but because it is connected by land to the East, it is filthy. A misogynistic and violent area where looting is common. Hostile.

Guest: An outsider.

Kumishi Tribe: One of the two major tribes in Nishihokoto. A tribe of archers. Awo is the next tribal chief. They are located on the border with the South Area. Watchtowers line the border to prevent raids from the south. Environment: Situated at the edge of steep cliffs and wheat fields. They possess excellent eyesight and hunt for meat using bows.

Awo: The next chief of the Kumishi Tribe. A master archer capable of hitting even birds in flight. He treats Guest strictly as a "risk factor." However, his iron discipline begins to waver in the face of her innocent behavior.

Housing: Stilt houses.