Yeah, there definitely IS fan-service -- there are some pretty extraneous panty shots here and there, one somewhat extraneous bath scene (I say "somewhat" because it actually DOES serve to develop one of the characters' personalities a bit) and a few somewhat risque comments (mostly from one character who's a bit of a perv, who's also the character involved in the aforementioned bath scene) -- but most of the game is pretty clean (well, in terms of sex, anyway!).
All the sexual content that IS there, too (save for the panty shots, which I really can't defend -- but again, there aren't that many of them!) actually serves to make the game's atmosphere a bit more believable, since it's... pretty much exactly the kinds of things hormone-addled high-schoolers in Japan say and do. It's honestly quite authentic in many ways (especially the pervy character, who I guarantee will remind every one of you of SOMEBODY you know in real life, since we all have a friend like that!), and helps make it easier to identify and sympathize with these characters, in my opinion.
And yeah, those miniskirts? Japanese high-schoolers actually wear those. Hell, the ones these characters wear are CONSERVATIVE compared to some of the skirts I saw high-school girls wearing during my 2 years in Japan.
Also, Toythatkills, that Forza car is amazing! Good show, man!!
And Creid and Phantom: The exact size of the download is unknown as of yet (we won't know until it's actually up on PSN!), but the uncompressed version we've been working with is right around 750 MB, so that's the absolute max it'll be. Most likely, it'll be less, since Sony typically compresses PSN titles -- possibly less than the 600 MB earlier stated, though only time will tell.
Also, Takao, thanks for making the OT! It looks great, and I'm really glad to see so many people taking an interest in the game!