TL;DR If you're the kind of person who is capable of empathizing with characters and doesn't approve of taking advantage of others, I heavily advise you turn away from this VN. If you're okay with seeing good people get taken advantage of, then go ahead. My conscience would not allow me to enjoy this game, even with the happy ending. Maybe yours will.
Voice Acting: For the sake of honesty, I'll admit that 1. I don't have enough experience with VA's to really establish an idea of what an industry standard would be. As such, I'll simply rate it based on my personal experience with it, and 2. I just read the text and clicked to progress - the voice acting, in my opinion, isn't worth sticking around to listen to. It's mostly just exaggerated moans and screams, and some of the lewder onomatopoeia don't fit with the character at all. At least it's suitably erotic and only distracting every now and then; worst comes to worst, you can just mute it. 2/5
Music: Not all that special, but surprising to have any of decent quality nonetheless. That said, nothing really stands out. It's there - it's not distracting, but it's not memorable. 3/5
Art: A lot of anatomical mistakes, but passable coloring. Artist really should revisit the basics. With that in mind, it’s still fappable - being a nukige, that's really the only thing that matters. 2.5/5
Story: It's a nukige, so I'll give it a rating with that in mind.
That said, it's standard nukige content - no real agency beyond "this girl just can't say no." At least it has a somewhat coherent "plotline," which essentially means it provides acceptable transitions from scene to scene. Believe it or not, I have seen scenarios where these have been omitted... A decent ending allows it an extra star. 3/5
Writing: Doesn't really create an enjoyable character. Honestly, a lot of the lines made me wince from a mix of secondhand shame and general revulsion. I very nearly quit entirely from the first chapter. I simply do not understand why they began the story the way they did; with how they ended it, there were far, far, far more palatable ways to begin. If they wanted to keep the looks of the MC, they could've done something vaguely interesting and made him a genuinely decent, if nervous, fellow. Such is plausible, and it really wouldn't have detracted from the experience. 1/5
Enjoyment: The sole comfort for this entire affair was the "happy" ending. If you're going to go that way, make the protagonist a halfway decent person, for gods sake. You can write lovey-dovey normal romance and keep your hardcore sex. In the end, at least he took responsibility - if he had abandoned her, I would've given this a
negative. 1/5
Overall: Final score of 2/5.
Edited for grammar. 4/28/2020
