"Yuki Yuna is a Hero: Churutto!" is a short-form anime series that serves as a companion to the main "Yuki Yuna is a Hero" franchise. The narrative revolves around the daily lives of the Hero Club members—Yuki Yuna, Togo Mimori, Inubozaki Fu, Inubozaki Itsuki, and Karin Miyoshi—as they navigate their school lives and responsibilities as magical girls. The series adopts a lighthearted and comedic tone, contrasting with the more dramatic and intense themes of the main storyline.

The plot is episodic, with each episode focusing on small, self-contained stories that highlight the characters' personalities and relationships. Yuna, the cheerful and determined protagonist, often takes the lead in the Hero Club's activities, which range from mundane school tasks to imaginative adventures. Togo, her best friend, provides a calm and thoughtful counterbalance, while the Inubozaki sisters, Fu and Itsuki, bring energy and sibling dynamics to the group. Karin, the more reserved and disciplined member, occasionally struggles to adapt to the club's whimsical nature but gradually becomes more integrated.

The series emphasizes slice-of-life moments, showcasing the characters' interactions and camaraderie. Themes of friendship, teamwork, and perseverance are woven into the narrative, though the stakes are significantly lower compared to the main series. The magical girl elements are present but take a backseat to the everyday humor and character-driven scenarios. The lighthearted approach allows for a deeper exploration of the characters' quirks and relationships, offering fans a more relaxed and comedic perspective on the Hero Club's world.