Not Just A Sister! is the fanlisting for Tachibana An from Tennis no Oujisama. This fanlisting is meant to bring together fans of our darling An-chan, whom as the title of the site says, isn't just Tachibana's sister ^.~ She's a fun gal and can keep up with the best of her boys off and on the courts and sadly she doesn't get nearly as much love as her awesome self deserves.