21 gyaru girls gather from Shibuya to the stadium for a grand autumn sports festival! Competing in no-bloomers and traditional bloomers, they debut specially made "T-back bloomers" that fully expose their buttocks. Events include quick-change cosplay with constant nip slips, centipede racing, sumo wrestling in oil and lotion where girls fight to steal each other's bloomers, a tug-of-war while enduring vibrator pranks, and a pole toppling contest turned into a wild "pole pulling" showdown—plus five more wild games! Seven heated events in total, with sweat and cum flying everywhere—absolutely must-see action!