Well, another Appetite VN, another serving of fast food, so to speak.
Unfortunately, even by their standards, this is one of their weaker releases in a number of ways. It features only two choices, the first of which allows you to pick between a quick, no CG ending or continuing the game, and the second allowing you to pick between two ending, the second of which also doesn't have any specific CGs associated with it. Beyond that, it inevitably suffers from being an invisible man silliness, because it blatantly ignores all the issues that come with needing to be naked to be invisible, as well as the fact that being invisible doesn't erase sound or smell, to say nothing of touch... As such, the story itself is inevitably weak from this aspect alone.
The main thing that's good, and that's only from a subjective point of view (and thus mileage will vary), is Yuki's design, which is pretty damn hot, so the scenes look good.
CG variety is about average for Appetite, so there's nothing to complain about there. Scene variety is ok, though there's at least one that doesn't have much to it.
Another thing to note is that the translation this time feels... off. I can't put my finger on it, but it feels like there's some stuff there that isn't quite right, either from "English don't work that way dammit" angles or because what's being said doesn't seem to properly fit with the context at times. Not sure what happened here, but it's not the best translation that happened here to be sure.
Beyond that, the NTR aspect is pretty meh. Yuki's boyfriend doesn't even have art and isn't present all that much, while Yuki herself is a massive sex addict that doesn't need much in the way of dick to get frustrated with him. Hilariously, she wasn't actually a slut. She just had a healthy sex life with the dude, but she hadn't ever been with another man, or at least, that's what seems to be implied. So MC with his bigger schlong and better stamina wrecks her quickly. The endings don't emphasize it much either, to the point where I wouldn't really call it much of a NTR. In one ending, she helps hook him up with another girl while she hooks up with the MC and in the other, he dumps her without caring all that much about her. In both cases, it doesn't look like he was all that torn up about splitting up with Yuki, nor did it seem like he suffered over it or anything... which kinda kills the NTR vibe.
All in all, an ok way to spend some time if your goal is to fap/schlick a couple of times, but not particularly memorable otherwise. Unless you really like Yuki's design, this one is an easy skip.