"Prince of Tennis: The National Tournament OVA" is an animated series that continues the story of Ryoma Echizen and his teammates from Seishun Academy as they compete in the prestigious national tennis tournament. The OVA showcases intense matches against rival schools, highlighting the skills and strategies of various characters. The series features familiar faces, including Tezuka Kunimitsu and Sakuno Ryuzaki, as they strive to prove their abilities on a national stage. With a mix of sportsmanship and rivalry, the OVA captures the excitement and challenges faced by young athletes in their pursuit of victory.