Stop!! Hibari-kun!
Genres: Comedy
Type: TV, Episodes: 35
Aired: May 20, 1983 to Jan 27, 1984
Studio: Toei Animation
Source: Manga
Rating: R+ - Mild Nudity
Synopsis:
A teenage boy has now moved in the home of his mother's friend, because she had died a while back. It just so happens that the Yakuza family has four beautiful daughters, but one daughter, Hibari, who is more beautiful then the rest of the daughters, is actually a boy. Hibari just can't keep his hands off our hero and so their crazy yet happy lives go on. 

(Source: ANN)