If you want something to play in the meantime, while waiting for Between Humanity 0.4 and Eternum 0.9, I would check out My Bully is My Lover. It's an absolutely amazing AVN that even Caribdis himself recommends to people! He is actually friends with MBiML's creator, NiiChan! MBiML is not a finished game, but it is actually in a lot of ways more complex than Eternum, because there are already different routes you can go down when playing the game! Granted, when Eternum 0.9 comes out that statement might change, since 0.9 will likely be the first update where you can get Orion straight up killed for good; but for now MBiML is the more detailed game. Anyway, it's really good! It has a slow start, but when it gets going, it REALLY gets going! I highly, highly recommended checking it out.
One thing that My Bully is My Lover was able to do for me that no other AVN, not even Eternum could do, is keep me captivated with the story even without the promise of lewd scenes. During my first playthrough of MBiML, I accidentally got myself on a route that was 90% plot, and 10% lewd stuff. And what little lewd stuff there was, was put at the start of the game, with only one character. So I went through the rest of that playthrough without any explicit content, nothing lewd, nothing to activate neurons, nothing at all. And yet, I felt energized and stayed genuinely interested in the plot. I had no boredom, no tiredness, and no fatigue whatsoever, despite knowing I would not be getting any more lewd scenes during this playthrough. For the next 6 hours, I stayed legitimately focused on the plot and what was happening with the characters. That's how good the writing is. That's a level of writing not even Eternum has. Not even Eternum would be able to keep me playing it for 6 hours without the promise of a lewd scene with one of the characters, even if the story is still really damn good. So, yeah, I'd check out My Bully is My Lover if you want something to play while waiting for Between Humanity 0.4 and Eternum 0.9. It's a really good game.
Edit: Spelling