Well, after playing through the game again from the beginning, here's my opinion: Is the game declining? Yes. Why? 1. Pointless extra characters, lack of CG, etc. As I saw in other comments, it's curious that after 11 chapters and almost a year of playing, we're still stuck on Rachel's mouth. Now, does this mean that in the next update Rachel should be violently raped to satisfy the fans? No.
The solution to give the plot a good storyline and add some sense would be the following. As we know, the creator makes few CGs for the game per update because he uses his time on other games, resulting not only in a lack of extra images but also in a drop in the quality of the plot, among other things. Rachel is our favorite in terms of the story; the trick is to focus on her and her corruption with John. The more specific the CGs are and the better the dialogue is written, the more eroticism and quality of the product will be. For example, Rachel has already demonstrated that both her breasts and her mouth are capable of satisfying John, thanks to her experience. We've even seen Rachel suggest "helping" with his erections to alleviate some of his back pain. By having Rachel take the initiative to please John and increase his arousal, the trick is to follow that line, and Rachel's suggestive texts as well. Before reaching penetration, we have to go through all of Rachel's defenses, which include: her throat, her feet, her ass, her vagina, etc. And for the corruption to make sense, it has to be done in stages. Now that Rachel is used to John's cock, we can have John suggest that he's no longer getting as much satisfaction from Rachel's mouth, since simple sucks on the tip are starting to bore him. So he suggests Rachel go deeper and take it slow so as not to pressure her. Rachel initially refuses, but since she can't make John ejaculate, she tries to go deeper, and that's how we get the beginning of deepthroating. I have a ton of ideas for giving Rachel the ideal corruption, but I don't want to waste time on something the author probably won't even see. I just think the game can still be improved, even at this low point it's at. I hope we get a good product, since the game had potential. If only I knew how to do CG and programming, I'd help if possible, haha.