Great idea, but poor execution.
I see the vision of what they're going for. Unfortunately, this is a generally unpleasant experience with the current content and gameplay choices. It's VERY rough around the edges right now. It's super buggy, lacks proper explanations for the game's mechanics, and is just plainly unpolished, unfinished, and more of a proof-of-concept than anything. (There is a surprising amount of content, but it's all very samey and lacks build-up.)
As a fan of "soft NTR", I appreciate that it doesn't lean into the "hard NTR" aspect, which is all about emotional anguish. I understand that most NTR fans enjoy that, but I've always hated it. Turns out, I find taboo, cheating sex far more erotic than mental torment. I don't think it'll stay that way, though, just going off of the dialogue and events that are present. I imagine this will have more direct, hard NTR in its final version. Sad for me, but great for those that want it.
Having said that, the sex is almost immediate, so there's nothing here for people that like a slow-burn. There's no tension, as the protagonist is repeatedly made aware and even outright directly told what is happening to his wife. It's a strange choice imo, as this genre of NTR, especially with the side-screen animations, often works best with an unwitting protagonist. It serves as a sexy contrast that only the player is aware of, which is a concept that has previously heightened games that would have otherwise been dismissed because of their bad art and/or awful gameplay.
Unfortunately, the animations lack weight, have poor alignment, have repetitive sound effects, and have no climax. The player is given little knowledge of what they'll be getting into with each mini-game they come across, and many of the mini-games have recycled animations, most of which are, again, poor. This makes the mini-games feels even worse, because the reward for engaging with them is mediocre, and the gameplay they provide is already awful/buggy. The cruise ship is one you come across after the mansion that really hammers this home.
The game's sections bleed together with little coherency, though maybe that's intentional due to the pseudo-dream setting of the plot. You're never really playing with any intent or goal in mind. You're just going from place to place, without a real method of navigating the world, or making sense of your progression within it.
The skeleton of this game is good, but it's got a long way to go before it's fun/arousing to play.