All participants, including the host, are forced to drink large amounts of water and begin the games already on the verge of peeing themselves. The games are designed to be especially cruel, pushing everyone's bladder control to the limit. With prize money at stake, the contestants endure as long as they can, but one by one they start wetting themselves, transforming the venue into a veritable sea of urine. Even the host eventually loses control and wets herself, yet she's forced to continue hosting while stuck in her soaked underwear. The first half features girls in uniforms (sailor fuku) and school swimsuits, delivering a nonstop series of accidents and mishaps that will surely satisfy fans of the genre.