The island nation of Yamatsumi, comprised of four islands spanning the cardinal directions.

Himari, born as a shrine maiden to purify impurities, and Rin, raised as a guardian to protect the shrine maiden. The two met in the chill of their fourteenth spring and gradually grew closer. However, behind the scenes, intrigues surrounding the shrine maiden were secretly stirring…

A story of two girls, tossed about by the turbulent waves of an era of rapid modernization.