"Coji-Coji" is a surreal and whimsical anime series that blends comedy, fantasy, and absurdist humor. The narrative revolves around Coji-Coji, a small, blue creature with a mischievous personality, and his interactions with a variety of eccentric characters in a bizarre, dreamlike world. The setting is a fantastical realm where logic is often subverted, and the rules of reality are fluid, creating a backdrop for unpredictable and humorous scenarios.

Coji-Coji is accompanied by his friend, a pink creature named Mojimojiman, who often serves as a foil to Coji-Coji's antics. Mojimojiman is more reserved and rational, contrasting with Coji-Coji's chaotic and impulsive nature. Together, they navigate a series of episodic adventures that involve encounters with strange beings, surreal landscapes, and nonsensical situations. The series lacks a continuous overarching plot, instead focusing on self-contained episodes that explore the absurdity of the world and the characters' reactions to it.

The supporting cast includes a range of peculiar characters, such as the enigmatic and often antagonistic Mr. K, who frequently disrupts Coji-Coji's plans, and the mysterious and aloof Princess, who occasionally appears to add an element of intrigue. The interactions between these characters are driven by humor, often relying on slapstick, wordplay, and visual gags. The tone of the series is lighthearted and playful, with an emphasis on creating a sense of wonder and amusement through its unconventional storytelling.

Themes of friendship, curiosity, and the unpredictability of life are subtly woven into the narrative, though the primary focus remains on delivering comedic and surreal entertainment. The series' episodic structure allows for a wide variety of scenarios, from mundane situations exaggerated to absurdity to entirely fantastical events that defy explanation. This approach ensures that each episode feels fresh and unpredictable, maintaining the viewer's engagement through its inventive and humorous take on the genre.