"Super Cub" centers on Koguma, a high school girl living a solitary and uneventful life in Yamanashi Prefecture. With no family, friends, or hobbies, her days are marked by monotony until she purchases a used Honda Super Cub, a small, reliable motorcycle. The Cub becomes a transformative presence in her life, offering her newfound independence and a sense of purpose. Through her interactions with the motorcycle, Koguma begins to explore her surroundings, discovering the beauty of the countryside and the small joys of everyday life.

As Koguma becomes more proficient in riding and maintaining her Cub, she meets Reiko, a classmate who shares her passion for motorcycles. Reiko owns a more advanced model, the Hunter Cub, and the two form a bond over their shared interest. Reiko introduces Koguma to the practical and adventurous aspects of motorcycling, such as long rides, camping, and navigating challenging terrains. Their friendship grows as they embark on trips together, experiencing the freedom and camaraderie that their motorcycles provide.

The narrative also delves into the technical and mechanical aspects of the Super Cub, highlighting its reliability and versatility. Koguma learns to perform basic maintenance and repairs, gaining confidence in her ability to handle the machine. The story emphasizes the importance of self-reliance and the satisfaction of mastering a skill, as Koguma’s relationship with her Cub evolves from mere transportation to a source of pride and accomplishment.

Throughout the series, the focus remains on the quiet, slice-of-life moments that define Koguma’s journey. The manga captures the simplicity and tranquility of rural Japan, with detailed depictions of landscapes and seasonal changes. The characters’ interactions are understated yet meaningful, reflecting the themes of personal growth, friendship, and the pursuit of happiness through small, deliberate actions.

"Super Cub" is a grounded and introspective story that celebrates the ordinary, finding beauty in the mundane and highlighting the transformative power of a simple machine. The narrative’s pacing is deliberate, allowing readers to immerse themselves in Koguma’s world and appreciate the subtle shifts in her life as she embraces the possibilities her Super Cub brings.