“Sprague 3” is a 4-on-4 battle game that uses ink to smear each other. The basic battle is a 4-on-4 team battle called “ground battle”. The ink is smeared on the ground within 3 minutes, and the final smear is applied. The team with more ink area (occupied space) wins.
The game stage of this work is “the chaotic regional city Barbarian Town”, which is the “depressed area” where evolved sea creatures such as squid and octopus have lived since ancient times. Its center, “Mandea Town”, has been rapidly redeveloped recently, mixing buildings from different eras and forming a unique culture.