I like this story itself more than the smut and I respect your decision. But I just want to ask: is it possible that you might consider adding an NSFW patch once you're all finished with the VN? Even if it has not to be free. Maybe make Cooper eventually get all lusty over Cyrus who won't be able to hold his newfound lust due to his body having changed and all (and his increased endowment ;) ). But then again, it's your call. This is merely my arrogant opinion.
Nonetheless, thank you for this amazing story and good luck!