At last, the dream of Katyusha and Nonna is right before them!! To defeat the champion, Kuromorimine, and the monster, Nishizumi Maho, Katyusha and her team are finally challenging the finals of the national tournament!! However, the match continues under the worst conditions, with bad weather and landslides, resembling a muddy brawl…. What are Nonna and Katyusha's strategies…? And the monster, Nishizumi Maho, stands in front of Pravda!!