Okay, while waiting for the next chapter, I'll try an honest review of the current ones. Not a native english speaker, so please forgive me for eye injuries.
First of all: as a girl, I'm not a huge fan of a single male character having a female harem (I'd rather have the opposite, but it's sadly not common in such games).
But: your girls are cute, with interesting backstories, and most of them are legit badass, so it's way better than in other harem games. And Orion's behaviour seems to deserve their attention, which not all MC can boast.
In fact I even can't say which of the girls is my favourite so far, they're all too good to choose!
About diversity: almost all characters are white people. But not all. The few exceptions being ChipChop and Chang, asians, that are mainly used for the comic relief and thus quite ridiculous, and mainly Benjamin, black, and an absolute asshole (not sure about Maat, she looked more tanned than black, but she's not exactly a positive role either, so…)
I think it's problematic. But it's quite simple to correct: there's a lot of bit players everywhere. You just have to make some of them visibly non-white, and it'll work way better (noticed there was one other black guy in the groups introduction, but we saw almost only his back in shadow, and I can't remember seeing him again later).
About the main character: Orion is cool. Not particularly handsome or endearing, but pretty good for the role. To be honest, I think the MC's look was the main issue of Once in a lifetime, but this one is just fine.
I'm not a huge fan of the big dick trope, but I have to admit you did some good use of it, especially the scene with Nancy while Orion was sleeping, which was funny.
I'm not sure about the suit. Not that I dislike it (well, I think it looks weird, but that's just a matter of taste), but it's weirdly used: you start by telling “It's not required but recommended”, and then it looks more like “It's absolutely unnecessary unless I want to show you a girl in it”.
I was a bit disappointed by finding a gem of doom and two thirds of the weapons of Atlas in the second chapter, which, at first, looked like long-term achievements coming way too quickly. But, of course, with the gem gone soon after and Calypso being what she is, the third chapter was reassuring about the game's length.
That was the lukewarm points. So now, let's see the really good parts.
I often only smile playing humorous games. You did make me laugh a few time. So, well done! Along the same lines, I'm not a huge fan of horror scenes, especially in adult games, but I didn't dislike yours, which is quite an achievement :-)
Really good work on the sound atmosphere, and good choice of musics. I didn't know Snake City before, and now I'm listening Run Boy Run while writing this. Not sure the lyrics really match the scene for this one, thought, but it does sound really good.
The phone calls with Nova <3 Both of them.
Great work on the different worlds (including Kredon), althought we didn't (for now, I guess) saw much about Ion and Ekabar. I thought from chapter 1's dialogues those two were supposed to be the most used, and finally not so much (yet). But most of those you introduced are really good and I'm curious to learn more about them.
(As I'm not really into cyberpunk, I was dubious about the neural implant when I first read the synopsis, but you managed it well, so it allows a wide diversity of worlds in a credible way, which is really cool.)
Magic effects are really good. Can't wait to see Annie's abilities (she looked really cool in the first time in Ion, but didn't have the occasion to do more than a show off for now).
The HP's parody (ouch, sorry, professor, won't say that again!) was really fun (except for the frog, poor Penny). I wonder it the trio of summoners will be seen again or not.
And, well… there's too much good scenes. When Orion tells Annie he likes her (really cool thing he asked before kissing!). That poor guy at the yoga club. Nancy punching back the Emperor. Alex's grandma (almost cried). The first meeting with Luna.
Not a huge fan of the need to punch Axel each time the choice is given, but, heh, it's Axel, so he had it coming (on the very first meeting, I first choose to be polite before we saw his “conversation” with Annie, then I rollbacked before Orion did intervene).
Now, what I see or wonder for the future.
I'd like to see Eva again. Probably not in the same circumstances (as she said), she could change her job or something like that. Don't know what you plan for her, but she looks like the perfect hidden character, the one that rocks the team if the player makes the good choices, and is totally missed else.
(Somewhat like Yuffie in FF7, with her cool but totally optional quest in Wutai.)
I'm wondering about how Luna's dad will react if he learn that Luna is part of a harem. He's fun, he likes Orion and his attempts to marry them off are cute, but he's also very protective and I'm not sure he'll like the idea of his sweet daughter being only one of many girls.
And, I can't wait to learn more about the very first phone call, when they arrived at Kredon. It was a good teaser, quite discreet as we didn't know about Calypso and the temple at the moment, but it was also the only real proof something special is going on for now (the Founder's freeze could be explained differently, and Benajmin's death isn't directly related to the team.)
(Of course, the 100% compatibility and the Neo-like abilities makes Orion special, but it still could be some other few people in the same situation. But a phone call naming him in the real world, that's something different. Hope we'll get an explanation.)
Finally, I'd say… even if there's of course a room for improvements (there always is), your game is currently one of the best adult games I ever played. Well, with such a story, it's better than a lot of mainstream games too. Congrats!