Chapter 29: Camping
The Blue Team and the Octolings, now as Team Eight, decide to go camping on Camp Triggerfish. Team Eight learns about the Rank system by Army. Eight challenges Blue Team to a Turf War to pass some time, with Army being the host. They all had fun after the Turf War match; however, Army dropped a photo while making curry which showed the Rank X Team, X-Blood. He explains that it is a newly made rank that is higher than S+. He researched some info about them since there is a chance his team will encounter them in battle.
Splatoon manga chapters