"Midori no Makibao" is a sports manga centered around horse racing, blending competitive drama with comedic elements. The protagonist, Makibao, is a small, green racehorse with an unassuming appearance but an extraordinary spirit and determination. Despite his diminutive size and lack of pedigree, Makibao possesses a fierce competitive drive and an uncanny ability to surprise both his rivals and spectators. His journey unfolds in a series of races where he faces off against larger, more prestigious horses, often overcoming seemingly insurmountable odds through sheer willpower and clever tactics.

The narrative explores the dynamics of the horse racing world, highlighting the relationships between horses, jockeys, trainers, and owners. Makibao’s owner, Midori, is a young girl who deeply believes in his potential, forming a strong emotional bond with him. Her unwavering support and faith in Makibao serve as a driving force for his success. The series also introduces a diverse cast of rival horses and jockeys, each with distinct personalities and racing styles, adding depth to the competitive landscape.

The races themselves are a focal point of the story, often depicted with high-energy pacing and strategic depth. Makibao’s underdog status is a recurring theme, as he frequently competes against horses bred for excellence, challenging the notion that pedigree alone determines success. The manga balances intense racing sequences with lighthearted moments, often using humor to underscore Makibao’s unconventional approach to racing and his interactions with other characters.

As the series progresses, Makibao’s reputation grows, and he becomes a symbol of perseverance and determination within the racing community. The narrative delves into themes of hard work, resilience, and the importance of believing in oneself, all while maintaining a focus on the excitement and unpredictability of horse racing. Through its engaging storytelling and memorable characters, "Midori no Makibao" offers a compelling exploration of the sport and the bonds that connect its participants.