Following their triumph over Shitenhouji Middle School in the semifinals, Ryouma Echizen and the Seishun Academy Boys Tennis Squad must now confront the two‑time reigning champions of Rikkai University‑Affiliated Middle School to secure the national championship. Rikkai seeks not only vengeance for their earlier defeat by Seishun at the Kanto Regional Tournament but also aims to capture the national title for a third straight year. In Tennis no Oujisama"s finale, the eponymous "Prince of Tennis" faces the "Child of God" in a direct clash for the national crown. Throughout, Ryouma must show his rivals and teammates that tennis holds more value than mere victory in the grand tournament arena and inspire future generations of players for lasting legacy today.