It is the late Edo period. Futaboshi Hikoma, the Hirado domain’s astronomer, is a rather eccentric person whose only interests are the stars and the sea. A beautiful bride Orie comes to him, and Hikoma vows to himself to cherish her for his lifetime. However, in less than a month, his new wife disappears without reason from this dreamlike married life. In truth, Orie is a female ninja that the shogunate has
