4thStage features a special performance by handsome Sato and gyaru-style Koji, presenting a couple's strip dance and public sex show. Dressed in sexy boxer briefs and vests, they perform a lively, erotic pop dance to upbeat music. Even as they shake maracas, the passion between them steadily intensifies. As sultry music plays, they toss off their vests and passionately embrace, stripping each other down without regard for the audience, transforming into revealing O-back and T-back bikini lingerie. Then, in front of 40 spectators, they boldly proceed into an explicit sex show. Sato teases Koji through her bikini, provoking his arousal. He proudly displays his fully erect cock to the crowd before Koji hungrily devours it. Koji then initiates a 69 position, wanting to taste him too, while Sato performs anal fingering on her, her bare ass fully exposed in a lewd pose. Koji's breathing grows increasingly heavy as she receives an enema nozzle insertion, writhing obscenely in uninhibited pleasure. Not satisfied with just enemas, Sato thrusts his own erect cock inside her, letting her ride him in the cowgirl position. They further expose their penetration to the audience, performing doggystyle and standing doggystyle, escalating the intensity. This explosive, passionate sex show delivers a truly mouthwatering experience.