Seira Ito Fotiou, a hafu (half-Japanese) girl, lives a seemingly normal life from childhood through school, college, and work. However, Seira has no idea that a life choice at the age of eight, a life choice during her final years of high school, and the career she chooses will have a profound impact on her—and on everyone in the world.
What is the connection between Seira, a billionaire heir to a large corporation named Yuukyuritoo "Mitsuishi the Light" Mitsuishi, and a secret research project controlled by a professor on an island in southern Japan? What is the connection between the professor and two gaijin (gaijin) who work as blue-collar workers in the countryside in Japan's northernmost coastal region?
How does the "graph" connect all of the figures above and the military to a mysterious Japanese historical tale, the Omatsuri (Grand Festival) of Circumadversum, and the Father of Geometry, Euclid?
Come join the reading rites of this novel to find out how the story unfolds.