Well, Birth of a Sin is a Dark Super Hero/Villain Romance with a (spoiler) firm Stockholm bent so...ooof. I guess if I were to compare it to a mainstream story of similar nature...it would have to be 50 Shades of Grey and it's ilk:
The Female MC is a Complete Virgin: HAHAHAHAH!!...HAHAHAHAHAH!!! AHHHHH no. She is not. In fact, Ira is the 'Christian Grey' of the book. A good chunk of the story is from her POV, and she is ruthless, charismatic, volatile, and also very experienced. I don't really like writing about virgins or women who are exceptionally innocent, so I wanted to have a powerful, rich, sensual heroine. She has the same possessiveness and anger as many of the male love interests in BDSM dark romances. However, I also wanted to balance that with her femininity, her volatile passion, and her beauty.
The Male Love Interest is Super-Experienced: This is also a bit of a no, though not utterly opposite, as the above trope. Tristan is also sexually experienced and a bit perverted. He is confident in his ability to please, and his flirtatious nature is contrasted with his 'angelic' appearance. However, Tristan is definitely the more naive of the two, and his own insecurities and desires cause him to ignore some SERIOUS red flags. He knows there are red flags, but he also has a White Knight Syndrome as well.
The Relationship Must Be Shaky Until the End: Part of what makes this story so dark and tragic is that I open it up with a relationship that IS pretty strong at first. There is very little tension, there are no arguments or will they won't they back and forth...mostly cause I find that tedious and not really part of the story. They actually start off having a conversation, showing they are interested in each other right at the beginning and have what people might say is an adorable relationship. I find that most relationships, in reality, have a honeymoon period. Everything is perfect and sweet. The sex is great, there is no flaw, birds are singing, etc. However, after this period is where the actual test begins. Cracks begin to show. While I do have a sudden break instead of gradual cracks, I definitely wanted to put a lot of early emphasis on the honeymoon before the mirage crashes down.
Third Act Miscommunication Leads to Breakup: My story has miscommunication and a bit of a breakup early on. This is a red herring. The miscommunication is truly serious, deal-breaking even. Tristan and anyone else would want to end the relationship. The problem is that Ira has no intention of letting that happen. Unlike Christan Grey, she is truly evil and ruthless enough to make Tristan hers and does not make excuses for it.
The 'Happily' Ever After: There will be an ending where no one dies. However, I want there to be a question. I can't really make this story end happily ever after considering all that has happened in it. Things will be ambiguous. There is a power-shift that is uncomfortable. Everyone in the story will recognize just how wrong things ended up. Ira gets precisely what she wanted, and so does Tristan. But are they pleased about it?
The story is definitely putting some other tropes on a pedestal though: 'More Than Mind Control', 'You are Worth Hell'. 'Amazon Chaser', it does reinforce some tropes, even some bad ones. However, it definitely will break a lot of them and hope folks enjoy that and will check my story out 