"Stop! Hibari-kun" is a 1983 anime series based on the manga by Hisashi Eguchi. The story centers on Kōsaku Sakamoto, a high school student who moves to Tokyo to live with the Oozora family after his father's death. The Oozora family is led by Ryūzō, a yakuza boss, and includes his three daughters: Hibari, Suzume, and Kujaku. Kōsaku quickly discovers that Hibari, the eldest daughter, is biologically male but lives and identifies as a woman. This revelation becomes a central point of tension and humor throughout the series.

Kōsaku struggles to navigate his new life, caught between his growing feelings for Hibari and societal expectations. Hibari, confident and unapologetic about her identity, often challenges traditional gender norms, creating comedic and dramatic situations. Suzume, the middle sister, is tomboyish and often clashes with Kōsaku, while Kujaku, the youngest, is more reserved and observant. The series explores themes of gender identity, family dynamics, and societal pressures, often through a comedic lens.

The plot unfolds episodically, with Kōsaku frequently finding himself in absurd or chaotic situations, often involving the Oozora family's yakuza connections. Hibari's bold personality and refusal to conform to societal expectations drive much of the narrative, as she navigates her relationships with Kōsaku, her family, and the outside world. The series balances humor with moments of introspection, particularly in its portrayal of Hibari's experiences and the challenges she faces.

"Stop! Hibari-kun" is notable for its progressive approach to gender identity, especially for its time, though it occasionally relies on stereotypes for comedic effect. The characters are distinct and memorable, with Hibari standing out as a charismatic and complex protagonist. The series remains a unique entry in the anime landscape, blending comedy, drama, and social commentary in a way that continues to resonate with audiences.