
Upon seeing Ryoma's performance, Ryoga decides to betray Sakurafubuki in order to play a match against his brother to see who's the better player. Tezuka and Fuji win their matches easily. Only Tezuka, Fuji, and Echizen are allowed to leave to play their matches. The team tries to form a plan of action while playing the matches as directed, but they are ultimately held hostage by Sakurafubuki's chef when Kikumaru Eiji is caught eavesdropping. It turns out that everyone on the ship are either gamblers or Sakurafubuki's henchmen, so therefore, Seigaku can only trust themselves. But, should they choose not listen and win the matches, the team faces the grim possibility of losing their lives. If they purposely lose their matches the next day, Sakurafubuki will rake in a lot of money from people that have betted on Seigaku winning. The next day, Sakurafubuki reveals to Tezuka and Oishi that they are actually part of an illegal gambling plot. It becomes clear that something is not right. In the bathroom, Sadaharu Inui discovers that the marble on the wall is fake when he tears off a piece of wallpaper. That evening, after a banquet dinner, Takashi Kawamura, being a sushi chef, remarks that the food did not taste as expensive as it looked.


Ryoma reveals that Ryoga was adopted by Nanjiroh many years ago, when they lived in America, but mysteriously left home prior to Ryoma enrolling in Seigaku. Aboard the cruise ship, Ryoga Echizen introduces himself to the team as Ryoma's older brother. The Seishun Academy Middle School tennis regulars are invited on a cruise by Sakurafubuki Hikomaro to play a match with his own tennis team.
