OVA series: The Nationals Arc
Doubles 2 of the finals: Inui-Kaidoh pair vs Yanagi-Kirihara pair. Inui's best data and Kaidoh's Tornado Snake are ineffective against Rikkaidai's pair. Inui seems ready to give up, but Kaidoh uses Yagyuu's Laser Beam. Kirihara transforms into a demon, purposely aiming at Inui and injuring him severely. Kaidoh turns into a demon himself, but was stopped by Inui. Soon after that, Inui collapses, Seigaku forfeits the match, and Inui is rushed to the hospital. This is the episode when they also find out that Ryoma lost his memory while he was still back in Karuizawa with his father, Echizen Nanjiroh. But while they were training for the National Finals something happened to cause Ryoma to lose all his memory about tennis.
Dobles 2 de la final: La pareja Inui-Kaidoh contra la pareja Yanagi-Kirihara. Los mejores datos de Inui y el Tornado Serpiente de Kaidoh son ineficaces contra la pareja de Rikkaidai. Inui parece dispuesto a rendirse, pero Kaidoh utiliza el Rayo Láser de Yagyuu. Kirihara se transforma en demonio, apunta a Inui a propósito y le hiere gravemente. Kaidoh se transforma a su vez en demonio, pero es detenido por Inui. Ryoma perdió la memoria cuando aún estaba en Karuizawa con su padre, Echizen Nanjiroh entrenando para las Finales Nacionales
