Wow, I'm just totally bedazzled; from the description, I had a general idea, but in less than 5 minutes I was already gobsmacked. The dialogues and the MC's introspection, particularly, are incredibly deep. The talk between Dad and Desmond was soul-moving. The girls are all using one or more trope.
And the comedy! By the Nine Circles of Hell, that scene at the onsen with Ken and everybody else! The scene with Mallory in her room when her parents arrive! And the lingerie store!
The models are great, the lewd scenes quite tasty, but the story is just so amazing! If you ever feel a bit more adventurous, I'd say this game's story and plots and characters could help you a lot in writing a small series of books based on this. Just sayin'...
Tldr; this game is shaping up to be an amazing work of art!
Definitely fav'ing and following!
P.S.: The only part that I'm actually wary about is the ammount of characters; as you build the game towards the conclusion, it will inevitably become more difficult to manage exposure and revelation for all of them without leaving loose ends. Still and regardless, I wish you the best of luck!