The game is super good so far so I'm not going to go on too much about what's good (it's pretty much almost everything).
I'll just mention two good things that I think separate this game than most others. The first one is I really like how Jenny is not the typical clueless young girl character (you know, the ones that don't even know what a penis is like in some other games). It's refreshing to see Jenny being comfortable seeing Sarah topless, and then both of them being naked together in the sauna.
The second one is how the game kept the focus on these three characters well. A lot of other games would have 2-3 main girls and then try to have a bunch of filler girls, then they'd milk the 2-3 main girls by going super slow with their progress while the MC randomly bang the other side girls just so it has sex in the game. This completely doesn't exist in this game because the game is only focused on the MC, Sarah, and Jenny, and that sex is already normal because MC and Sarah being a couple. No development time is wasted on unnecessary bloat which means more development time spent on the characters that matter in the game. If the game does add more female characters in the future, I do hope they would be necessary to the storyline and not just as filler side girls (you know it, if it's other games, the masseuse would've randomly touched MC's dick or something like that). This game is a clear example where quality is more important than quantity.
What I'll talk about next is the small criticism which is inconsistency. This is a completely minor issue, and I don't know why, but it immediately grabbed my attention. It's when Jenny went shopping for clothes and she was worried about the last outfit being too daring. I don't have any issue with the skirt being considered as daring if it's consistent with her characteristic. But I feel like this particular moment was inconsistent with how she is in the game because the purple dress she wore to the store itself is already showing so much cleavage, and then her bikini bottom is pretty much a thong that showed her ass even more than Sarah. Surely she isn't so prude or shy that she'd consider that skirt to be too daring.
Overall, definitely a great game that is worth to follow the progression. Keep up the good work and looking forward to what's next in store.