Ryoma walks into a tennis resort, finds college players using the courts, and decides to humiliate them with casual perfection. The OVA knows it has no time for a real match, so it builds the entire thing on character moments instead, Echizen's cold confidence, the regulars' loyalty, the specific rhythm of how this team actually works. It's a love letter to people who already love these characters, stripped down to the part that matters most.

Seigaku's tennis regulars trade their normal routine for a one-day boot camp at a mountainside tennis club. The punishing program starts with a run all the way up to the resort, followed by drills built around each player's style, with a fresh batch of Inui's dreaded juice waiting for anyone who falls short. Then a group of rude university players shows up and demands the courts reserved for Seigaku. Irritated by their arrogance, freshman Ryoma Echizen takes them all on by himself, with the courts going to the winner. A single-episode OVA mixing sports action, adventure and comedy.