"Di Gi Charat Theater" is a comedic manga series that expands on the whimsical universe of the "Di Gi Charat" franchise. The narrative revolves around Dejiko, a cat-eared alien girl from the planet Di Gi Charat, who works part-time at a maid café called Gamers in Akihabara. Alongside her companions Puchiko, a small, quiet girl with bunny ears, and Gema, a robotic teddy bear, Dejiko navigates a series of absurd and humorous situations. The episodic structure of the manga focuses on their daily lives, blending slapstick comedy, surreal humor, and parodies of otaku culture.

The story often highlights Dejiko's over-the-top personality, her rivalry with Rabi~en~Rose, a rival maid who frequently challenges her, and her interactions with the eccentric customers at Gamers. Puchiko, despite her diminutive size and soft-spoken nature, often delivers deadpan humor or unexpected moments of mischief, while Gema serves as a comedic foil with his robotic antics and occasional malfunctioning. The series also introduces other recurring characters, such as the café's manager and various patrons, who contribute to the chaotic and lighthearted atmosphere.

The humor in "Di Gi Charat Theater" is heavily reliant on exaggerated expressions, wordplay, and meta-references to anime and manga tropes. The plotlines are intentionally nonsensical, with scenarios ranging from Dejiko attempting to become a pop idol to the group engaging in bizarre competitions or dealing with strange visitors to the café. The manga maintains a fast-paced, gag-driven style, with each chapter presenting a self-contained story that emphasizes comedic timing and visual gags.

While the series does not delve deeply into character development or overarching plotlines, it thrives on its ability to deliver consistent, absurd humor. The interactions between Dejiko, Puchiko, and Gema form the core of the narrative, with their contrasting personalities creating a dynamic that drives the comedy. The manga's appeal lies in its ability to balance its quirky characters with a playful, irreverent tone, making it a lighthearted and entertaining addition to the "Di Gi Charat" franchise.