Once a year, even as adults, some people still experience bedwetting—it's a common struggle many can relate to. In this film, black-haired, small-breasted girl Rena Aoi openly confesses, "I'm the same." The story unfolds with her socially oblivious older brother constantly intruding on her most private moments of incontinence. What follows is an intense, relentless sexual battle as her lustful brother pressures her with lewd propositions. The film features six stunning pissing scenes—while sleeping, outdoors, and directly in front of her brother—each depicted with unmatched intensity, showcasing large puddles of urine and the extreme bulging of her soaked pants in ways rarely seen elsewhere.