Although I can't say I got as emotionnally invested in it as you did, Adastra definitely did exceed my expectations.
What was supposed to be quick fap material actually turned out to be a very interesting, much longer story than I had anticipated, and it's very easy to get lost in playing, always wanting to know what is going to happen next. I just wanted porn and I got way more out of it.
Now I'm glad to hear the game had such a strong effect on you, last time a game had me feel like that, it was Undertale, it's just so much better when you go in with no expectations and end up really loving the game. Best feeling a game could provide in my book. Really looking forward to Khemia now, although I've heard the story isn't about the human and Amicus, and I just really wanted to see their reunion.
My apologies if anything I said was not clear, english is not my first language :)