An OVA series covering the past and the future of the regulars that participated in the National Tournament. Volume 1 features two episodes, one starts with an episode featuring Seigaku visiting Osaka for a practice match with Shitenhouji, and an episode featuring Atobe's start at Hyoutei in his first year. Volume 2 also features two episodes, one starts with the second part of Seigaku's visit to Osaka, and an episode on Kirihara's start at Rikkai in his first year.
Watch Tennis no Ouji-sama OVA ANOTHER STORY: Kako to Mirai no Message episode 1 online — subbed and dubbed, with automatic AniList / MyAnimeList progress sync.