Futaba-kun Change

Futaba-kun Change is the story of a young boy at school who goes into the bathroom to look at a girlie-mag his friends have given him to look at. He gets excited, dizzy, feels strange, and ends up turning into a girl!

Not quite your normal run of events. It seems that his entire family has a genetic arrangement which causes them to change sex when they become excited.

So now Futaba-kun must deal with being Futaba-chan (an incredibly beautiful girl, by the way), and his mates from the school wrestling team which decide they want Futaba-chan on the team also!

The best source of information for the manga is at the link below. This is one of the most under-appreciated and under-known anime of all, in my opinion. Fortunately, though, it's started to be issued in comic book form in the U.S. It seems the translations are pretty faithful to the tankobons except for some U.S.-type cussing.

The storyline seems to become somewhat stranger as the series goes on.