Totally agree with Vangeles. Too bad the story wasn't longer or that Banten did not make any other stories based on the Natsume sisters... Come on, look at his drawing style, it's just PERFECT for hentai !!
PS : and he is the only guy who actually did some good art of Kagerou from "Basilisk" too ! (look at page 27) Too bad he did not draw any story for her... :-/