I can't understand revenge stories where the MC's "revenge" is to give that person an orgasm. That's one of the major ways the "revenge" AVN's I've seen on this site fall short - payback isn't fulfilled just because you hate fucked them. I understand this is supposed to be porn, but we can have a story with porn elements, too. Let the MC get his payback, then also let him fuck other people.
The Hana "resolution" was so underwhelming. I don't know why the MC is focusing on getting payback against the boss when Hana is 99% to blame here. The blackmail wasn't even anything special. "Cheat on your boyfriend with me or I'll fire him." Like... Ok? That's it? No threat of physical harm or anything more than we need to start looking for another job? That is super flimsy and honestly the boss did the MC a favor to show that Hana is just so fucking stupid to think "I guess I have no other choice. I have to cheat on my boyfriend because I love him so much." She is who we should have a master plan for.
Honestly, I think it would have been better if she wasn't blackmailed and wanted to cheat so then the MC has the option to go after both Hana and the boss together. I don't care about the NTR aspect of it because that is the basis for the revenge - I'm 100% okay with that - but to try to paint her as a "victim of blackmail" is just... I won't buy that for a penny.
Are you aware of a VN called Fallen Roads ? Its basically a self explanation for your question. If the medium is a porn, obviously porn will be the main factor in regards of revenge. And as it turns out, time after time, the majority of people no mater if they enjoy vanilla, harem or cuckhold stuff, once a cheater -> always a cheater and they cant forget her even if the author tries to redcon, rewrite or even force her upon the player.
Which makes it harder to create a game which plays either around, or took some aspects of it. But I see your point, Im also find it weird why is it so hard to make a revenge story which focus... well, on revenge. Most of them either MC forgives her and they are happy/or some sort of secondary waifu. Or he hates fuck her and throws her away, but all of them which I saw were just excuse for gangbang scenes, "wife"sharing (if wife cheated on MC) or "normal" sharing scenes to outright prostitution. The later seems to be the common thing.
The other thing is if you let Hanna go so early from the story the is no revenge, since she was dealt with. Hence most revenge story either have multiple people who cheated(I think the better word would be wronged) on MC so we can have varriaty of people to punish sexually, but also destroy emotionally and physically like bullys/douches/antagonists.
I hate to bring this up as a example, as I hate this "manga" and it deserves its bad reputation. But "NTRevenge" has the same issue or lets say many of them as we saw in this game...but even worse. If you know what im talking about, you know.
Which brings me to
Fantasy Catharsis
Trying to paint Hana as just another victim doesn't sit right with me either. I'm just hoping that's going to be the end of it when it comes to her part of the story since I've already gave her the boot. Like I've said a bit ago here, if people are interested in more of her story fine, but I've already checked out and don't wish to further have her show up in the story and I'm hoping my decision reflects that later.
Sadly this is the common way out for such characters. Some try to force them into players by either guilt tripping them, or outright demanding acceptance as in the end people will always come to a point if they want to forgive them or not. Perhaps its just depends on the appeal of the character ? I mean, would people really be interested what Hanna did, or what we would do to her if she was an unattractive, fat feminazi with the california haircut ? I dont think so. Or why do you guys think every NTR has attractive moms, sis, GFs or even Gilfs, where a normal story about romance or even harem has multiple "ugly" characters (females speaking) as a way to show not to being disappointed that MC cant have sex with her/them or them dying in the story.