First off, I'm amazed that you reply to all your comments, that's great to see from a content creator.
Secondly, this game is so good I cannot even put it into words. I literally just created an account on itch.io just for this one comment because I felt like I had to praise this masterpiece. I just recently finished Once in a Lifetime, which may I say was amazing as well. But while Once in a Lifetime's story was enthralling, I was equally as enticed by the NSFW aspect of it because teens are just like that yk. But holy shit, I've just started playing Eternum and I was convinced that it wouldn't be able to top Once in a Lifetime but you most definitely within the first few minutes of playing proved me wrong. I genuinely felt like playing the game for its storyline content alone with the NSFW parts merely as an added bonus. It's immersing, looks stunning and satisfies the urges of horny teens. Literally a Win Win Win. Considering this game is free, the graphics are so amazing Jesus christ and I promise you if I wasn't broke I would make a hefty donation because this game deserves it.
By far the best VN I have played so far so keep up the great work man and I can't wait to keep playing and seeing new updates. (I also hope you'll continue making games after this one, even though that might be a long way down the line...?).