On a hot summer day, a fireworks display in Maoxia town is about to be held. Kazugawa Naisha (voiced by Hiroyuki Hiroyuki), who is studying in a local high school, is not immersed in a happy and peaceful atmosphere. She is about to move to another city with her mother (voiced by Matsuko), and her heart is full of loss. In an impromptu swimming competition, Naisha beat his classmates Diando Shimada (voiced by General Kanada) and Sukeosuke Yasuke (voiced by Makesuke Miyano). Then she confessed that she liked Sukeke and hoped that she could play with each other at the fireworks event. But Sukesuke and Diandao were then involved in a debate with friends about whether the fireworks were round or flat, and everyone agreed to go somewhere that night to witness. As a result, Sukeke stood up the appointment, and also secretly liked the classic way of Naisha, so he discovered the girl's secret and mind. He blamed his friends for this and longed for time to start all over again to welcome the original game. This film is based on Junji Iwai's TV series of the same name.