Nah, according to VGMdb, that was Masafumi Ogata.
Oh, that reminds me, Hiroki Kikuta, the composer for Secret of Mana, Seiken Densetsu 3, Koudelka, etc., has done a few hentai soundtracks. I know nothing about the quality of the games and they probably aren't available in English, but I can vouch for the music being great, assuming you like his style. They sound a lot like Secret of Mana actually, if Secret of Mana was a happy-go-lucky dating sim, haha.
I watched the TV series. Haven't seen the movie version yet.Which Air? the tv series or movie? Both were somewhat different but the same in the end. I think I preferred the movie simply because the girl's illness was not just a case of the jitters. That and the ending of the tv series just had me scratching my head when the events repeated but without the guy.