A sports cartoon based on American football, "Light Speed Runner No. 21", which is full of street flavor and full of funny jokes bridge section
The film is about a timid high school first-year student Kobayakawa Se, who has been introverted since childhood, and he is weak in order to avoid Afraid of being bullied by others, he blindly escaped his life. After graduating from high school, Seto decided not to be complacent about the status quo, and tried to change and be a brand new self, so that he would be full of confidence in the future and live a more fulfilling and exciting life. To be bullied by others, to be a strong, brave and fearless person, so under his determination, he finally mustered up the courage to show another appearance, so he joined the American Football Department, and he served as a manager within the football team. All good life has just begun to be full of expectations for life, and during this period, in order to avoid being bullied by others, Seta practiced a way to escape, which attracted the attention of the captain of the American football team Hirumo Yaoichi (ヒル魔). He is notorious for his toughness and habitual use of despicable means, so he plans to train Seto to become the mysterious light-speed foot with the number 21. Can Seto change his past self?