The art is top notch and the writing is good by nukige standards.
The protagonist is tolerable and doesn't get in the way of your enjoyment. My only complaint is that he's rapey as fuck in two scenes. I like rape games, but this isn't a rape game, so those scenes were pretty jarring and unpleasant.
The sex scenes in general are pretty good. You can tell that this was written by someone who has actually had sex, which is always a breath of fresh air. The sexual content is a bit too vanilla, but the scenes themselves are written in a pretty steamy and intimate way. Just keep in mind that this game is 100% vanilla.
The translation is good. It's edited MTL, so a few lines are pretty jarring. Nonetheless, those unintelligible lines are very few and far between. I'm guessing the MTL was edited by a native English speaker, which is nice. The only thing you'll see often is the weird use of words like "spoil," "pamper" and "rush." Other than that and the very occasional poetry, your reading experience won't have any issues.
After getting the true ending (wedding) you get the option to see a chunk of the game through Manami's POV. That's both a good and a bad thing. It's good because female POV is objectively better than male POV, but it's possible that you'll get sick of the sex scenes, since you've already seen them. Still, female POV is always a nice addition to any eroge. Just beware that one CG variation (kissing) is only found in this mode for some reason, so you'll have to play it (or skip through it) if you want 100% of the CGs.
Solid nukige. 7/10.