Most games what keeps me hooked is characterization. Especially text games like this. Sure, games can be simple but ones like this that can balance the horny and the other emotional storytelling are good stories. In any case, it would be interesting to have other aspects that could be bought in a more exotic sex store. Since most of the stuff in doorstore, which I just realized the wordplay of, is general use, the most erotic being the pump and the plants. But yeah, I wanna see possibly an expansion on the characters. If anything all of them deserve some time in the sun. I especially wanna learn about the secret kinks of the characters. But don't let me fully drive your creativity! That's what keeps the game unique.
Really good visual Novel that does this that I would recommend reading is By Your Hands. Although the story isn't complete, what is there is really good. I won't spoil the twist of the beginning of the game but something o especially love is how the protagonist has a complete unique perspective on life. A thing that most stories fail to do is not be afraid to have different cultures or character cultures that can be blacker than gray sometimes. The protagonist's responses is great with how you actually having a horny response makes him obsessed with having sex rather than just the person themselves. Which is a great detail in my opinion. It forces you to have to balance out the horny and the love. I especially love how jarring the tone shift in the story is after choosing a route. But in any case, this game has that culture aspect with how the characters aren't all living under the same set of rules.