"Teekyū" is a fast-paced, absurdist comedy anime centered around the daily lives of four high school girls who are members of their school's tennis club. Despite the club's name, the series rarely focuses on actual tennis, instead emphasizing the chaotic and nonsensical interactions between the characters. The narrative is episodic, with each short episode lasting only a few minutes, packed with rapid-fire dialogue, surreal humor, and exaggerated situations.

The main characters include Kanae Shinjō, the club's captain, who is often the most level-headed but occasionally gets swept up in the group's antics; Nasuno Takamiya, a wealthy and eccentric girl with a penchant for making bizarre statements; Marimo Bandō, a hyperactive and unpredictable member who often drives the group into strange scenarios; and Yuri Oshimoto, a quiet and seemingly normal girl who occasionally reveals her own quirks. The dynamic between the four is the core of the series, with their personalities clashing and complementing each other in ways that fuel the humor.

The plot lacks a traditional overarching storyline, instead relying on a series of disconnected, often absurd vignettes. These range from mundane school activities, such as studying or club meetings, to surreal and fantastical situations, like encounters with aliens or time travel. The humor is derived from the characters' exaggerated reactions, wordplay, and the sheer unpredictability of each scenario. The series frequently breaks the fourth wall, with characters acknowledging the absurdity of their situations or directly addressing the audience.

"Teekyū" is characterized by its rapid pacing and minimalist animation style, which complements the chaotic tone of the series. The humor is often self-referential, with jokes about anime tropes, pop culture, and the characters' own quirks. While the lack of a conventional plot may not appeal to all viewers, the series excels in delivering quick, bite-sized bursts of comedy that rely on the chemistry and eccentricities of its main cast.