Tennis no Oujisama Movie 1: Futari no Samurai - The First Game

Ryoma Echizen and Seigaku's regulars accept an invitation to play exhibition matches aboard a luxurious cruise ship owned by the wealthy Hikomaro Sakurafubuki. Their surprise grows when Ryoma meets Ryoga, a young man claiming to be his older brother and serving as captain of the opposing team.

The elegant voyage soon exposes an illegal gambling scheme. Seigaku is ordered to lose after the first matches were deliberately arranged to make wealthy passengers bet on them, and refusing could cost the boys their lives. Trapped at sea, the team must outplay both their opponents and Sakurafubuki's armed men, while Ryoma's confrontation with Ryoga becomes a match of its own.