The second daughter, Tsubame is two years older than Hibari. With the exception of hairstyle, she is almost identical to Hibari. She often pretends to be Hibari to get him by health inspections and the like.

A teenaged Kohsuka has now moved in the home of his mother's friend, because she had died a while back. Its just so happens that the Yakuza family has four beautiful daughters, but the one daughter, Hibari, thats more beautiful than the rest of the daughters is actually a boy. Hibari just can't keep his hands off Kohsuka and so their crazy yet happy lives go on.<br><br>
(Source: Anime News Network) 

Kousaku, a teenage boy, moves in to the home of his mother's friend after she dies. This friend happens to be a Yakuza boss with four beautiful daughters. Kousaku is surprised to discover that  the most beautiful daughter, Hibari, is biologically male. Hibari is also very interested in Kousaku, and so their crazy but happy life together begins. <br><br>
(Source: Anime News Network)

Tsubame Oozora