Four girls form the sole membership of the tennis club at Kameido High School. The club president, Kanae Shinjo, is prone to catastrophic boredom and treats the laws of physics as mere suggestions. Nasuno Takamiya is the heir to an incomprehensibly vast fortune who applies her wealth to solving problems in the most impractical ways possible. Marimo Bando is a walking legal violation whose hobbies include theft and kidnapping. Completing the quartet is Yuri Oshimoto, the group’s only first-year student and the only one who knows how to play tennis, forcing her to act as the long-suffering straight woman to her seniors’ utter chaos.

Rather than focusing on sports, the series is a rapid-fire barrage of absurdist comedy, with each two-minute episode delivering a standalone, self-contained vignette. The narrative abandons traditional storytelling for surreal and unpredictable scenarios, from impromptu trips to an army base and helping an alien refuel her spaceship to more mundane school activities that quickly spiral into madness. The humor derives from the breakneck pacing, nonsensical character dynamics, and an endless stream of visual and verbal gags that defy all logic.

Over its run, the series expanded with recurring supporting characters such as Tomarin, an alien who becomes Marimo's roommate, and Udonko Kondo, a peculiar member of the school's newspaper club. The relentless energy and episodic nature continued across multiple seasons, with the anime becoming known for holding a record for having some of the shortest episodes in television. The franchise also spawned spin-off series focusing on specific characters, such as the wealthy Nasuno and the rival team from Usakame High School, further exploring the same brand of high-velocity, physics-defying comedy.