The English isn't abysmal and full of errors, so it's above average. Which is interesting, since AI art(and 3D CG) has so frequently been used by people that had no other skills either so the writing and code often suck too. Good start.
Disappointed by lack of virgin tag. Was hoping for something like the player character being too self-conscious and inhibited feeding into a growing NTR fetish that leads him to watching her fool around with other guys instead of being the first to do it himself. I really never would have guessed a goody good-girl that gives her virginity to another guy instead of her boyfriend would be even uncommon, but I really never see it outside rape, which is just bad, lazy writing that loses all the appeal. Or it's something worse.
It's still very early in development. Maybe we can see an alternate start where the player never had the confidence to do it. I can only hope.
Anyway, the first sex scene in the prologue has dark gray streaks that look like smudges on my screen.
Glad to see the fantasy being referred to "seeing her cheat." Calling it cheating does make it a lot hotter, even if it's actually just cucking.
"You see, before we started dating, I fooled around with someone" is lame. Yeah, when there's distinctly nothing between us, there was something lewd. Oh well, we were literally the furthest from dating each other in our whole lives at that time. An extended period of getting more and more distant, having never been romantic before either, and then not even seeing each other. This isn't NTR, this is just drama. And hey, drama is fun, but it's not NTR for me. I'm glad, at least, that it doesn't have the twist where she lost her virginity to Yuuji before dating the protagonist. That'd just be anticlimactic.
Them working up Taro together has a cute duo dynamic kind of feel to it. You know, I'd figure Taro would actually be worse at tutoring with the knowledge of what's on offer for him. That's a lot to take in for a shy nerd. Probably adds a lot of pressure that wouldn't normally be there.
I don't have enough time right now to finish the available content, stopping after Taro, but felt like saying my piece.
Smooth reading, not a slog. Fairly lukewarm but positive. I'll play more later.