A martial arts tournament has been organized in near-future Japan to identify the strongest female fighter in the nation, sponsored by a combination of family restaurant chains and the prestigious Ryōran Private School for Women. The prize is ten billion yen. Asuka Honda and Tetsuko Ōgigaya become aware of the tournament and its organizer, Miranda Jahana, whose involvement suggests the competition is not entirely what it appears to be. Asuka teams up with Yuka Takeuchi, who has been quietly monitoring the whole arrangement, and together they work through the bracket — defeating competitors from various school clubs and restaurants — toward a final round that the structure of the tournament guarantees will be against the heads of the Jahana Group itself.