I am wondering, is there any future plans to adds H-Scenes to the game to adds to the plot and makes the game feels a bit more alive, at all ? Since I think you did had it at once point and would loves to see where you can and could takes them to with it.
That's a bit of a loaded question, and I'm not exactly sure how to answer it but I'll try my best.
You must be referring to Kendra's House of Pleasure? I certainly do intend on opening that back up at some point. I temporarily blocked it off because I'm unsure of how to go about Sienna's entry into such a place. I also want to get rid of that guy over there, as he seems very out of place (not to mention the bugged dancing pole in Kendra's Palace, which, for whatever reason tends to freeze up the game). I think I mentioned this on my Patreon, but there will be 9 girls that can join Sienna in the House of Pleasure, and once Kendra has opened Sienna up to the possibility of kinky girl sex, then you'll also be able to fool around with the other 8 girls as well.
Aside from the House of Pleasure, there are two more scenes I have planned but haven't implemented yet, in order to further develop Sienna's personality. These are basically extensions of the previous events (Sienna get kidnapped, and also the guy asking for help getting his bag). Obviously they would be a bit different than the previous events, but with similar choices.
I also want to apply the new sex animation style to all the sex events in the game, including the first one with the Black Spider.
I'd also like to add at least 2 more boyfriend options for Sienna in The Abyss.
As for the main storyline, there's not really much planned in the way of h-scenes to go along with it. If you've gotten Jennifer's key then you know about
There's also an optional route in the end-game that would have Sienna using sex to deal with someone (depending on choices you've made), but the large majority of end-game content will not be sex relevant. I do, however, have a few plans for post-end-game h-content.
There's also the possibility that by h-scene you mean large full color hentai images:
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As opposed to hentai animations:
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(I also plan on adding animated backgrounds for sex animations later on as well)
I'm not sure how others feel, but I personally much prefer the animations and want the game to be full of them.
Edit: I forgot to mention that I have plans for Sex Scent. Although it's not exactly relevant to the storyline it should make the Abyss a little more interesting.