"Koume-chan ga Iku!" is a short-form anime series that centers on Koume Tsukisato, a young girl from the countryside who moves to Tokyo to live with her older sister, Akane. The story unfolds through Koume's daily experiences as she navigates life in the bustling city, often contrasting her rural upbringing with the fast-paced urban environment. Koume's innocence and curiosity lead to humorous and heartwarming situations as she interacts with her sister, neighbors, and classmates.

Akane, Koume's sister, is a hardworking office employee who often finds herself balancing her job with the responsibility of caring for her younger sibling. Their relationship is a focal point of the series, showcasing both the challenges and joys of sibling dynamics. Koume's interactions with other characters, such as her classmates and neighbors, further highlight her adaptability and unique perspective on city life.

The episodic nature of the series allows for a variety of scenarios, from Koume's attempts to understand modern technology to her encounters with unfamiliar urban customs. Each episode is brief, focusing on lighthearted moments and slice-of-life humor. The narrative emphasizes Koume's growth as she gradually becomes more accustomed to her new surroundings while retaining her cheerful and optimistic personality.

The series is characterized by its simplicity and charm, offering a gentle exploration of themes such as family, adaptation, and the contrast between rural and urban lifestyles. Through Koume's eyes, the audience experiences the quirks and challenges of city life, making "Koume-chan ga Iku!" a relatable and endearing portrayal of everyday experiences.