In the near future, litter-picking has become a competitive sport as popular as soccer. Akari stands out the least in her class, but one day she meets Tokio—a charismatic SpoGomi competitor blessed with an overwhelming amount of talent and popularity. Thus starts a coming-of-age story that involves young people from around the world, united via SpoGomi and the aim to create towns, rivers and oceans free of garbage.

Competitive Litter-Picking ("Sports Gomi-Hiroi" or "SpoGomi" for short) is a real-life competitive sport. With famous corporations joining as part of their CSR activities, and even a "High School Cup" involving high schools from more than 35 regions, SpoGomi competitors are on the rise. This anime aims to increase the recognition of this sport around the world.