I'm loving the game, some characters more than others. The MC can really be a dick unnecessarily, wish you had more of a choice on that (know that would be quite a bit of work though).
One thing that really bothers me is the order for each girl. I kind of jumped through to the end of Sasha (love her the most), so when doing Layla, the MC seems like a complete imbecile when she's talking about the plot which he should be easily be able to connect... Or he's being a complete dick playing dumb. I realize your probably suppose to keep pace with everyone so you learn more from each girl or so but if you don't... Wow, it's VERY jarring. The easiest way to fix this to force more parity between the paths for each girl (I saw some of this while doing Sasha, but it's really not enough). I would probably be a bit more strict with it for at least storyline order purposes. Otherwise you'd need to have triggers where the MC is like I know about this already let me bring you up to speed (fade out and in)...
Otherwise, it's very jarring and honestly just appearing like sloppy storytelling.
Examples:
Done with Sasha's story so far. Now going further along Layla's path and she's talking about the dome area and stuff... and MC acting like he hasn't a clue :/ Especially annoying with name drops in that conversation where it's like oh super interesting with all the context I have already, and the MC is like who dat? Another example is with Yui talking about the place she had to go to get you know what and mentions the mayor, and the MC is like well he couldn't live there like that... This is very dumb if you've already done all of Sasha up to this point and its pretty obvious how this is happening to an extent (and who would be up there).
Also hopefully more lewd scenes with Sasha are in the works
Also possibly for Celestine (understandable if that is low priority), although personality wise (Jamaican spiritualist or something?) definitely not my favorite... blue hair is indeed hot.