I appreciated the nice guy, wholesome take to the whole visual novel thing. Not that I've played a lot, but it reminded me a bit of Caribdis' games, although with a lot more girls. I also appreciated the variety of girls and stories there were. 
Still lots of work to be done (on stories and QOL) but overall a 5/5. 

Music/sounds and phone UI were two things that came to mind for QOL. Phone like, maybe have all levels of x-ray find the jammers? Doesn't make sense not to, and I'm pretty sure that's what kept me from finding them for a while. 

A few grammar errors, but small ones. The only one I remember off the top of my head was...Zahara's story line. 

As for music/sounds, perhaps some basic music for morning/day/evening/midnight? Or switch it up for different days of the week. Give each girl a theme. idk, the silence can just be kinda uncanny. A few sound effects might help too (outside of scenes), like door squeaks or gunshots at the range. On the other hand I could imagine the sound effects and music in a game with lots of repetition like this getting real annoying fast. Having a large selection for the player to choose on the phone is an idea - can't remember which other game it was, maybe Ripples? Or Harem Hotel. But that's an idea. Or you could contact Caribdis for music ideas? I know they had some problems with some licensing recently, but they also had some pretty banger songs in some scenes. Their visual novel is linear so a bit different, but something to consider. 

Stories are great. Appreciate the variety and the acknowledgement that not everything is for everyone, and the warnings for those. Personally hoping for more Merc...I mean, Dr. Zeigler story. 

Wish I could support financially but unfortunately I'm...not able to do so for all kinds of reasons. Best of luck and thank you for restoring some of my hope in humanity.