Amateur girls walking through the city aim for a 1 million yen prize by challenging a game of "Red Light, Green Light," but the game has special rules. To begin, they must change into swimsuits and proceed without being touched by the ghost. The path to the ghost is divided into three zones, each featuring escalating tickling pranks. The teasing intensifies progressively, starting at the neck and armpits, then gradually moving to the cleavage and sides. While the amateurs struggle to endure, they end up succumbing to vibrator tickling right before the finish line, failing the challenge. As a result, all five girls immediately face a punishment game of hardcore sex.