+The Profag isn't a complete pushover or a cowardly pussy.
Once he finds out his fiance is cheating he usually takes action and doesn't stand for it.
In the Cool Senpai route after finding out about what's going on, he goes straight to the other guy's place and demands some answers. The guy gives him a 'reason you suck' speech, and the profag tries to fight, only for the guy to fuck him up, then taunt him more and reveal he's ALSO banging his sister AND killed his best friend Krillen. This provides the profag with the sufficient emoption to turn into a Super Saiyan and he fucks the senpai up. (Not entirely sure what he did but given the screen turning red and the loud, drawn out scream
from the senpai, we can assume it was something nasty.)
In a different ending for the senpai route, he finds videos of the senpai nailing Sayaka and decides he's going to call her out for being a cheating whore. He waits until the they're at the wedding reception, then plays a video of her fucking the senpai and acting like a huge slut on a big screen in front of everyone, her parents, her friends, and all the other guests. Understandably, she freaks out and loses it trying to block everyone from seeing what's going on, then breaks down sobbing.
She looks up at the profag and says something along the lines of, 'I can't believe you would do something so terrible to me.' To which our boy is like, 'Hope you have fun with your new life. Peace.' Then turns and walks the fuck up out. Seriously, in a genre plagued by whining losers, this guy gets a Bro-Rating of Broseidon, God of the Brocean.
There's another part where he knocks out the teacher guy she's cheating with and forces him to reveal what's happening before he leaves her. I won't go into detail 'cause we've already established he's not a punk bitch.
Now, while you probably wouldn't want all NTR profags to act this way all the time, it is a refreshing change from what you'd usually expect
+The crazy lesbian route is awesome
One of the girls in Sayaka's drama club, Akari, decides she's madly in love with her teacher and that she's going to have her for herself. There're two endings to this, but they both start out the same. The profag meets a girl pulling for a cosplay cafe and finds out it's an underclassman from when he was in college who used to work
at the same restaurant as Sayaka(Pretty sure that's how it was established...). She gets him to come into her work and they trade information. (Pretty sure it's a more friendly-type thing and she pressures him to do it. I do know he's intially reluctant to do anything with her.) She contacts him one day and asks him to visit and she manages to convince him to come by. Then he wakes up the next day in a love hotel, with her clinging to him and he's blackmailed into a relationship with her. (Pretty sure he starts to enjoy himself as things progress. Go figure. xD)
In one ending, he begins to figure out she's not what she claims, and when he confronts the girl he thinks might be her, she tases him and he wakes up tied up in a room. Akari has been feeding information to Sayaka about the profag cheating on her with a girl from a cosplay cafe and has consoled her in order to pick her up on the rebound. The profag then has to watch hot lez action where Akari convinces Sayaka to give up on her cheating fiance, only he's tied up so he can't even rage-fap.
In the other ending, he's tazed and when he wakes up Akari is there and admits to being the cosplay girl, explains why she did it, and then goes bat-shit crazy and basically rapes the profag under the premise of having sex with the person who has sex with Sayaka is like she herself is having sex with her teacher. Lolwut.
In this ending, the wedding goes off without problems because Akari doesn't want to hurt Sayaka, so long as the profag agrees to keep their affair going. She enforces this by whipping out a knife and showing him what's going to happen to his Hyper Weapon if he doesn't agree. You're then treated to a scene on the honeymoon night where after doing it with Sayaka, the profag goes next door and has to do it with Akari, who's also dressed up in a wedding dress. Doublelolwtfbbqsauce. Bitch is krazy.
Haven't seen a scenario play out like this before in an NTR game, so I give it points for originality. Also, despite her craziness, I found Akari really interesting; I had a strong suspicion she was the the cosplay girl(For all I know, in the translation it might be blatantly obvious, but I was just going more on my NTR intuition. Also, if anyone knows of any similar scenarios, please share!) and it was cool to see how it played out.
+ The different interaction between characters
Within the same route the characters will act completely different in different scenarios.
Including the aforementioned one with Akari, another is how the profag's sister acts. In one scenario she's jealous of Sayaka for being chosen by the senpai and has her gang-banged by a bunch of guys to show her brother and ruin Sayaka's relationship. In another she's happy to be cock-comrades with her. Also, while the profag usually doesn't accept Sayaka cheating, in one he allows her to sleep with the senpai on a regular basis because he loves her and wants to keep their marriage(Or something like that, either way it's a big difference from his usual behavior.) While characters usually behave the same despite different endings in most games, this allows for different kinds of 'what-if' scenarios that I think is interesting.
So, yeah, while the game still has problems, they're things I didn't like as much and others I felt really could have been improved upon, it's a step in the right direction for sure. Give it a shot and it might surprise you too.