You know, the more this project goes on, the more I'm convinced that this game wasn't actually meant to have erotic elements involved in it.
The voice acting, setting, sound design and overall presentation don't lend themselves to themes of sexuality to the same degree as most other eroge. That's not a complaint, mind you, just an observation. It feels like you want to tell a legitimately amazing story but felt the need to tack on some sexy stuff to ensure it got the attention it deserved. Again, not an insult. Personally, however, I think this could stand on its own merits. It's an interesting premise, all its own.