The TV anime will start airing on October 6th (Thursday)! In a pool floating on a land, a fighting sport [Kyōjo] where competitors use their butts and breasts as weapons! What comes to mind is butt sumo! As we enter the pro arc, this work becomes even more unmissable. The ultimate butt armor, which has been banned, is somehow circulating... And the culprit is none other than the senior, Shinonome, whom Nozomi and the others know well!? To uncover the truth, Nozomi and her friends head to "Butt Island," where the factory of the butt armor manufacturer, the Fujisaki family, is located! This volume is packed with mystery like never before! Be sure to check it out alongside the anime broadcast!