Tennis no Ouji-sama Season 1 Episode 18 English Subbed Episode Title:The Love Letter.Episode Description:Tezuka found out Nanjiro is Ryoma's father. Nanjiro Echizen finds a letter from Ryuzaki and remembers the days when he trained under her as a Seigaku regular. Meanwhile, Ryoma's opponent, Shinji Ibu, shows his skills when he is able to return Ryoma's Twist Serve, as well as his revealing his own serve, the Kick Serve, which is similar to the Twist Serve. Ryoma then switches to his left hand, and the game heats up between the two player's serves.