"Tsurupika Hagemaru-kun" is a comedic slice-of-life anime centered around the daily life of Hagemaru, a mischievous and resourceful elementary school boy. Hagemaru is known for his distinctive bowl-cut hairstyle and his knack for getting into trouble, often devising clever schemes to achieve his goals, whether it’s acquiring snacks, avoiding chores, or outsmarting his peers. Despite his antics, Hagemaru is a relatable character whose actions reflect the playful and sometimes chaotic nature of childhood.

The series is episodic, with each episode focusing on Hagemaru’s interactions with his family, friends, and neighbors. His family includes his hardworking but easily frustrated father, his kind and patient mother, and his younger sister, who often becomes an unwitting participant in his schemes. Hagemaru’s friends, such as the timid and gullible Gorilla and the sharp-tongued Mitsu, add to the comedic dynamic, often finding themselves caught up in his plans or competing with him in various childhood games and challenges.

The humor in "Tsurupika Hagemaru-kun" stems from exaggerated situations and slapstick comedy, with Hagemaru’s over-the-top reactions and creative problem-solving driving much of the entertainment. The series captures the essence of childhood, portraying the simplicity and absurdity of everyday life through Hagemaru’s perspective. While the show lacks a continuous overarching plot, its episodic structure allows for a variety of humorous scenarios, from schoolyard antics to family mishaps, making it a lighthearted and nostalgic portrayal of growing up.