Understand the Net King Asura's Divine Way at the Beginning

He traveled to the Net King world and became Echizen Ryoma's older brother, Echizen Ryuya. At the age of ten, he understood Ashura Shinto under the teachings of Echizen Nanjiro. Tezuka Kunimitsu: "He is the pillar of Seigaku!" Sumire Ryuzaki: "That guy Nanjiro really raised a good son. The potential and talent possessed by Echizen Ryuya far surpass the samurai Echizen Nanjiro. He is a rare tennis genius in a thousand years!" Echizen Nanjiro: "This guy will definitely surpass me in the future!" Echizen Ryoma: "... Who is your biological son?" ... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.