"Negibōzu no Asatarō" is a short-form anime series that adapts the classic Japanese folktale of the same name. The story revolves around Asatarō, a mischievous and lazy young boy who lives in a small village. Despite his carefree nature, Asatarō possesses a unique ability to communicate with supernatural beings, particularly the "Negibōzu," or green monks, who are small, ghostly creatures. These spirits often appear in the form of floating green heads and are known for their playful yet troublesome behavior.

The narrative unfolds through a series of episodic adventures, each highlighting Asatarō's interactions with the Negibōzu and other supernatural entities. While Asatarō often uses his connection to the spirits to avoid work or play pranks on others, his actions frequently lead to unintended consequences. The villagers, though exasperated by his antics, occasionally rely on his abilities to resolve problems caused by the mischievous spirits. Over time, Asatarō's relationship with the Negibōzu evolves, blending humor, folklore, and moral lessons.

The main characters include Asatarō, whose cleverness and laziness drive much of the plot, and the Negibōzu, who serve as both allies and antagonists depending on the situation. The villagers, including Asatarō's family and neighbors, provide a grounded perspective, reacting to the supernatural occurrences with a mix of fear, frustration, and occasional gratitude. The series balances lighthearted comedy with elements of traditional Japanese folklore, offering a whimsical yet culturally rich viewing experience. Each episode is self-contained, making it accessible for casual viewing while maintaining a cohesive thematic thread centered on Asatarō's unique role in his community.