Fantastic game! One of, if not the very best adult game of its type on NG! Well made artwork (like the art style, too, personally), animation is very smooth, the action is fun, the sounds are great, and the story is fun while still being short enoug to get right into the action (I was right there with Lance when Flutter was talking: so cute it's sexy)! I also liked the end menu that lets me continue the story or go back for more (this IS a porn game, after all: the story's fun, but I know why I'm here).
However, just because it's awesome doesn't mean it's perfect. I have several suggestions for making the next one even better (ranked from hardest to easiest to implement, I think):
1) Change the sequence transitions from "fade to black" to actual transitions. i.e. when I ask her to start blowing me faster, actually show her switching up instead of fading out and back in to the new sequence.
2) Different BGM sound options - Music, Voice, SFX - would allow better customization of the experience. If I don't want to hear the voices (no matter how sexy)
3) Add a skip button, so if we've already played and just want to have some fun later, we can dive right in (I can see it skipping to right when we see her on the bed first time and she says "Welcome home, master"...).
4) On a very minor note, the command buttons could be a Bit bigger for legibility (does that say Sop Fap or Slow Fap? I have better then perfect vision and even I have to squint a bit).
All in all, though, these are just ways to improve and add onto an already excellent game. I can actually see this becoming a series similar to Meet'n'Fuck. Please keep it up, and I look forward to seeing more of your work!