I really loved the game, but I think there are a few things that could be improved.
1. I think the girls' moans could be a little louder. I only played Megumin, but it would be interesting if they changed.
2. In the climax scenes, instead of using a white background, I would suggest showing everything falling on top of the darling. A special dialogue option for each girl would also be interesting.
Otherwise, I loved it, and I play these kinds of games a lot. I think you have an amazing game; keep it up!