Just finished playing it, and I have mixed feelings. On one hand, the slow pace is something I feel the NTR/NTS scene is sorely lacking and it works well in Blurring the Walls. The AI art is also really good for what it is, though you can tell it's AI art, especially in some instances. I also absolutely love how the game goes about exploring exhibitionism, as I don't think many NTR games have much of that. However, that does lead into one of my issues with the game, that being the actual NTR, or lack thereof, itself. I know the game is still a work in progress but several hours of AI art and dialogue in and I would have expected the GF to have had sex with someone else at least once. Hell, as someone else said, I almost feel as though Terrace is the real cuck here, because both Ari and Ayumi are all over MC and shit on Terrace, which I usually would be fine with but he's clearly the one meant to be cucking the MC.
As of update 0.5, I give it a solid 8/10 as a VN and a 5/10 as an NTR/NTS game. The NTR just doesn't really go very far just yet.
Though I will note the writing and art is still so good that at several points I considered supporting the Dev, I just don't think I've seen enough quite yet to commit to it though.