Issei, Kuon, Hatanashi, and Towa are the four girls organizing the tournament. The competitors are so tiny that the bodies of these four girls resemble continents by comparison. The four girls will each take turns putting the tiny competitors through deadly trails involving their giant bodies. The four girls will try to make the tiny competitors fail, and they will often bend the rules. The tiny competitors will all be shrunk even smaller after each round, down to micrometers or even nanometers.