"Puchimas! -Petit Idolm@ster-" is a short-form anime series that serves as a spin-off of "The Idolm@ster" franchise. The narrative revolves around the daily lives of the idols from 765 Production, but with a twist: the idols are depicted as chibi-sized characters, referred to as "Puchidols," who interact with the original idols and staff in a comedic and lighthearted manner. The series primarily takes place within the 765 Production office, where the Puchidols engage in various antics, often causing mischief or getting into humorous situations.

The main characters include the original idols from "The Idolm@ster," such as Haruka Amami, Chihaya Kisaragi, and Miki Hoshii, who are portrayed in their standard forms. The Puchidols, miniature versions of these idols, include Harukami, Chihayami, and Mikimami, among others. These tiny characters exhibit exaggerated traits of their full-sized counterparts, adding to the comedic tone of the series. The interactions between the Puchidols and the idols, as well as the staff members like Producer, create a series of episodic, slice-of-life scenarios that emphasize humor and charm over a continuous plot.

The series lacks a central storyline, instead focusing on self-contained episodes that highlight the playful dynamics between the characters. Themes of teamwork, friendship, and the challenges of idol life are subtly woven into the comedic framework, though the primary emphasis remains on the whimsical and light-hearted nature of the Puchidols' adventures. The brevity of each episode, typically lasting only a few minutes, makes the series accessible and easy to watch, with a focus on quick, entertaining vignettes rather than deep narrative development. Overall, "Puchimas! -Petit Idolm@ster-" offers a fun and endearing look at the world of idols through the lens of its miniature, comedic counterparts.