Saki, Anju, Chiaki, Ami, and Kaya reunite for the first time in years. The five of them excitedly decide to go Toshimaen Amusement Park, a place that was very important to them when they were younger. None of them know that they're about to enter a nightmare…

While on a work trip, 37-year-old Sakurai meets 19-year-old art student Yoichi in a quiet, charming house—sparking an unexpected connection across generations.