This one is really bad. I wasn't expecting much, since I'm not too fond of phone-simulation games, but for a quick one I thought it could work. And I guess that, to some degree, if that's the only thing you are looking for it might. The characters have no interest, and neither does the story, it moves so quick there is no buildup, no tension, no nothing. I can't take it seriously that this was a "perfect couple" if in a couple days things escalate like this and without any real reason for it (outside you being away). Then there are "choices"... suposedly there is an NTS and an NTR path, but the difference is tremendous, taking the NTR "path" is just missing all the content. So you basically have a kinetic novel that pretends that it isn't.
Render quality is mediocre, not only in execution but also in believability: there is no way there's a camera taking those "photos" and "videos" so she can send them, there is none, not in the way things are supposedly happening. Also, there aren't that many renders either, and animations are very very few and very basic. I took out all the sound since I found it annoying as hell. At least I found no bugs in it, which is nice. I do get that the vertical "camera" is meant to feel like it's a phone screen, but it doens't work for me with no other elements to make it look like a screen (like battery levels, wifi, and so on) and in PC it looks just like an almost-empty screen.
So, all in all, unless you really really want a generic story poorly told with a phone, then you'd probably do better to skip it.