Stop!! Hibari-kun! - Season 1

Following his mother's death, high school student Kōsaku Sakamoto travels toTokyoto live with a friend of his mother's, Ibari Ōzora. When they arrive at the Ōzora household, Kōsaku discovers Ibari is the boss of the Ōzora Group yakuza organization. Kōsaku considers leaving, but has second thoughts when he meets Ibari's four children: Tsugumi, Tsubame, Hibari and Suzume. Although he initially believes Ibari to have four daughters, Kōsaku is shocked to learn that Hibari, who looks and behaves as a girl, wasassigned male at birth. The next day, Kōsaku enrolls into the same school as Hibari and Tsubame, and Kōsaku learns that everyone at school believes Hibari is a girl. Kōsaku is in the same class as Hibari, and one of their classmates named Makoto Shiina takes an instant dislike to Kōsaku. Shiina provokes Kōsaku and punches him only to get punched himself by Hibari moments later.

After having a nightmare where Hibari kissed him, Kōsaku is woken up by Seiji, an underling of the Ōzora Group. Hibari walks into Kōsaku's room and climbs into his bed. Ibari walks in and sees what he thinks is the two sleeping together, causing him to have aheart attack. Ibari decides to use a "Spartan method" to make Hibari more manly. The trainer, "Tatsu the Spartan", arrives at the Ōzora household. Despite his intimidating appearance Hibari makes fun of his spaced-out face, comparing it to aflatfish. The next day, Hibari and Kōsaku walk to school together, much to the dismay of Shiina, while Tatsu stalks them. At school, Hibari is shown to be both intelligent and athletic. Tatsu reports his findings to Ibari, stating that Hibari has what it takes to be a man, but being a "pervert" holds him back. Tatsu brings Hibari into the familydojofor more aggressive training and cuts part of Hibari's hair with scissors. Now angry, Hibari defeats Tatsu, destroying the dojo. Tatsu believes if Hibari ever acts like a man she would be an incredible yakuza. Kōsaku reflects on the day's events, feeling relieved that Hibari did not change, but refuses to admit he feels that way about her.