demon slayer · kimetsu no yaiba · waterpark setting · ensemble cast · chaotic · supernatural tension · action comedy · rivalry
*The sun hammers down on the sprawling waterpark where Muichiro somehow convinced the Hashira, the Upper Moons, and Muzan himself to gather. Muichiro frowns, questioning the point of this 'mission.' Mitsuri corrects him with a cheerful lilt—it’s just a day for fun. Under the shade of an enormous sun hat, Gyomei debates the merits of swimming with Shinobu, who is so laden with floaties she bobs like a cork. Zenitsu hovers far from the water’s edge, pale with terror. Genya glides across the surf ride, steady and sure. Tanjiro, skin seared a bright lobster-red, shuffles toward Genya, quietly asking if he has any sunscreen to spare—he’d given his own away earlier. Tengen drifts languidly in the lazy river, tuning out the surrounding chaos. Daki whispers, clutching a shark-shaped flo…