At Oodachi High School, Sumo is more than just a martial art or a combat sport, it's a divine ritual. Ushio Hinomaru, a new student, discovers his unexpected passion for Sumo despite his small stature. He decides to join the struggling sumo club and challenges traditional rules of the sport. Ushio and his club members work together to achieve the Hinoshita Kaisan title, the pinnacle of professional Sumo wrestling. This high school tale showcases their excitement and determination, fueled by an unquenchable passion for the sport. Additionally, Volume 8 boasts a crossover one-shot between "Kuroko no Basket" and "Hinomaruzumou" titled "Kiseki no Mattanashi Taiketsu!!"