Finally managed to play
https://www.dlsite.com/maniax/work/=/product_id/RJ01066599.html. The dev rolled out v1.02 which fixed my problem. Apparently it was a bug specific to Window 7 users. Now for my opinion on the game:
The game is honestly a mixed bag, especially so for those on the thread who hate cheating or NTR in their netorase games. If you want any happy ending, this game is definitely not the game for you and the same goes for any of this dev's previous games. The trademark of this dev's games are mystery NTR coupled with heroine corruption and an oblivious MC with a tiny dick. Even though this game is netorase and has netorase in its name, all of the dev's trademark tropes are in this game. It starts off very wholesome but once the netorase starts you pretty much realized the MC is fucked. All of the netorase in this game is outside of the MC's eyes and he occasionally gets pictures and NTR reports but he believes the pictures are faked by his gf to make the netorase sexier and the heroine straight up lies in every NTR report. Her lies start off with good intentions since she doesn't want to hurt the MC's feelings however after a while she's lying mostly because the other guy told her to. Its pretty debatable as to whether or not she even cares for the MC by the end. After a while, the netorase devolves into pure cheating. The netorase is officially finished but she's still seeing the other dude. By the end of the game she convinces the MC to restart the netorase however he's none the wiser that she's just using it as an excuse to fuck the other guy.
And that leads me into my main gripe. The MC. I already knew that the dev's games all had oblivious MC's but its still pretty annoying. He believes in the heroine so much that any thoughts of her actually cheating on him rarely ever occur and when they actually do, either he or the heroine pulls out the most retarded excuse that somehow works. Why are there so many used condoms and semen everywhere? Just fake props to spice up the netorase. Why's the bull's dick so big? Its gotta be a dildo. Why does the mystery girl in the porno look similar to my gf, fucks in the same neighborhood I live in, have a very similar backstory to what me and my gf are going through, etc.???? Must just be a coincidence. Why is my gf rarely around? She's hanging out with her friends. Why is she looking sluttier and acting sluttier by the day? Embracing the city life. Its really fucking annoying. It gets way worse than this. It starts off a bit hot but the longer it drags on the more you feel as if he was always destined to be cucked and the heroine even says as much when she finally falls. The dude straight up gets a video from the heroine where she dumps him, disrespects him, acts in all sorts of ways he's never seen her act, etc. and he genuinely believes it. Until the heroine comes home 3 days later and says lol its fake trust me, anyways I gotta go see my 'friends', btw can we do netorase again?, btw you're banned from sex the entire summer break.
Despite all that I think that the game is great. The art, while simple, is extremely hot and so are the scenarios. I genuinely like the heroine but she's dumb as bricks and by the end of the game, she's a pure slut. I just wished the MC was a bit more in the know. I don't mind that he got cucked hard, but I wish he at least knew a bit more about what the heroine was doing but just didn't know how hard she fell. When it comes to netorase turned netorare, I prefer when the MC knows that the heroine might have fallen a bit too far and he's both worried that its gone too far, but also aroused at what the heroine has become.
Overall, if you're in it for pure netorase. Don't even give the game a shot. If you don't mind when netorase turns to netorare, then I definitely recommend this game. As a netorase game, its a solid 4/10. Despite the NTR and bad ending, its still got good scenes that push my netorase buttons but those scenes are pretty rare since the cheating kicks in pretty early. It does get a resurgence at the end but by that point the heroine's already fallen so its only really netorase in name. As a NTR game, I give it a solid 7/10. Could've been a 9/10 but the MC is just so fucking dumb that it shatters any immersion I have. Its not even that he makes dumb decisions, I could excuse that, its that he also blind as a bat and is nearly incapable of believing he's been NTR'd. He could see the heroine getting knocked up right in front of him with no disguise while she's rejecting him in the most cruel ways possible, and all the heroine would need to say is that she's faking it for him to believe it. For people who like netorase turned NTR coupled with an oblivious MC, this is possibly the best game out there for you. My only real hope for this game is for it to get an ending where the heroine comes clean with the MC and he accepts her despite the cheating. Wouldn't even mind if she still fucks the other dude, in fact I would prefer that. Luckily the game is supposedly getting an update sometime in the future so there's a chance. Even if that doesn't come true, more NTR is more NTR. I ain't complaining.
I just copied this post from the one I did on the netorase forum in F95zone. They're really peculiar when it comes to NTR in their netorase games so I made sure to emphasize that aspect of the game.