Art/Graphics: 3/5
It uses the usual RPGM stuff and some of the sex scenes are illustrated, however the characters are all kinda ugly? Except Ryoa herself. I'm pretty sure that's intentional because some of them look silly on purpose but I just don't think it's a good idea for a NTR game
Music/Sounds: 4/5
Music is solid, there's a few sounds but I've definitely seen other NTR games make much better use of sounds, here they are underused and kinda low quality.
Story/Writing: 3/5
The writing quality is pretty meh, I get that it's a translation but I'm just telling it like it is, this is substantially worse compared to a project that's initially created in english.
The NTR setup is kinda weak, there's a reason why most games use a mother, wife (or at least fiance), because that strong preexisting relationship is what makes the NTR so intense and taboo. Here the female character is simply your friend, you never even dated so it just feels like what happens is not a big deal anyway.
The storytelling itself is ok, it does get the job done. Not tried the "vanilla" ending because that's not what I'm playing NTR games for, but the NTR stuff itself is split into 6 paths ( 6 characters that the girl can cheat with, I'm calling them paths because I think playing multiple at the same time while technically possible is highly retarded).
I don't think that's a good idea actually, I would've preferred one great highly-detailed story rather than 6 small ones that are pretty similar anyway so not very interesting. And all 6 characters are kinda weak tbh, half of them are gross dirty hobos, the other half are just awkward and cringe. That in turn then reflects on the female's character: if she's attracted to such weird people what does that say about her?
Gameplay/UI: 5/5
NTR games are usually VNs but here it's an open world (not really because you still have a limited number of events happening in chronological order) but it definitely feels more "free" and refreshing compared to the usual stuff.
Also the fact that you can trigger phone calls whenever you want as opposed to them being scripted is a brilliant idea, although this feature didn't get nearly the amount of attention it deserved to make it truly great, each phone call is a few sentences long at most. Such a shame because that is actually very clever and exciting gameplay.
Conclusion:
Pretty decent, definitely will provide you with a few hours of entertainment if you're into NTR, but it's nothing extraordinary either. There's much better out there.