Inspired by his tennis champion father, Ryoma is determined to take his game to the next level and train in the US. But in the middle of an intense tennis battle to save his classmate Sakuno from dangerous villains, they somehow find themselves transported back to the past, just as Ryoma’s father is about to undertake his final championship match at the US Open – when he was mysteriously forced to retire.

Inspired by his tennis champion father, Ryoma is determined to take his game to the next level and train in the US. But in the middle of an intense tennis battle to save his classmate Sakuno from dangerous villains, they somehow find themselves transported back to the past, just as Ryoma’s father is about to undertake his final championship match at the US Open – when he was mysteriously forced to retire.

The regular players from Seigaku participates in an exhibition game aboard a cruise ship. However, they discover that the event is being run by a corrupt millionaire heavily involved in illegal gambling and betting, who demands that they lose the match on purpose. To add to the confusion, one of the players on the rival team introduces himself as Ryoma's brother.

The regular players from Seigaku participates in an exhibition game aboard a cruise ship. However, they discover that the event is being run by a corrupt millionaire heavily involved in illegal gambling and betting, who demands that they lose the match on purpose. To add to the confusion, one of the players on the rival team introduces himself as Ryoma's brother.

Hyōtei Gakuen's strange (but impossibly wealthy) captain Atobe Keigo decides to throw a giant party for his friend and teammate Kabaji. He invites both friends and rivals. Together they participate in many different sports and events: dancing, swimming, soccer, a relay race, a haunted house, and more.

Hyōtei Gakuen's strange (but impossibly wealthy) captain Atobe Keigo decides to throw a giant party for his friend and teammate Kabaji. He invites both friends and rivals. Together they participate in many different sports and events: dancing, swimming, soccer, a relay race, a haunted house, and more.