Now this confused me a bit because if the MC transmigrated into the body of the villain instead of the protagonist, then where did the book Yan Yan went to? Then who is the person living inside Yan Yan? Why does she act like the Tang Tang inside the book although it is mentioned that she is supposed to be a business woman in her original life? But thankfully, this was answered by the end of the story.

It is indeed true that this entire story will clash with someone's moral and ethics. As stated by few reviews that the MC took advantage of the ML at the beginning because she didn't reveal her true identity of not being the actual Ming's lost-found daughter. However, for me as a reader I felt that I would have done the same if I were in her shoes, cause she transmigrated at a very delicate and difficult stage of the actual body. In which her reputation were already plummeted in front of the public as an entertainer due to the actual body owner actions. Moreover, she didn't have a stable house or family (her stepmother refuse to pay her the actual 40% will's money and never even mentioned it to her. Furthermore, she even resorted to use physical and mental abuse on the original owner after her stepfather's death at the age of 7, & stepsister who was the real instigator for the real owner to accept the talent show in the first place) to support her. Nevermind finding a job or similar to that because the original owner didn't even completed her high school days. So, to be safe and sound she took the first boat that sail to her besides she was already planning to leave after gaining a real footing in the entertainment industry. You have to also understand that the MC real talents lies as an actor who have worked in the entertainment industry more than seven years since she was 18 years old in the original world. While planning to complete directorship course as well to expand her career horizons within the industry.
Now let's move on to the ML, who's in my opinion is good and well-matched with MC. As there was nothing exceptional or nothing dull about him I saw as a character. Whereas, MC was a straightforward while he was your typical Chinese male ceo with cold exterior less talkative personality and only gets softened with the MC after getting acquainted with her. Let me clear something about them first, which is it was the ML who started to fall for the MC first, as she only wanted to clear the disgust and unclean reputation infront of the ML for her because of the original body actions. And for only that matter she took the initiative to please the ML with her small actions such as making coffee and all. Yet after living with him for a while she also started to feel that he's the only one in this world with similar situation as her (from the original world to this new transmigration world) with no actual relatives to rely on. That's why she took a day of during her hectic schedule of variety show to spend quality time with him for the new year occasion. Since then the feelings for her gradually grew in my opinion, as never have someone did something so homely thing for him. This is why after acknowledging his desires he decided to take the psychological treatment route to clear his concise of such unhealthy thoughts for a blood related person.
As the story progress, the MC also didn't took much time to get her feelings together that's when she decided to come clean with everything. Even though she thought she might be thrown out of the house (it was meant as to never get a chance with him again if that happens and not for having no food or house type like thoughts) but before she confessed she did told him that there's no blood tie between them, yet he still refused to believe. And still continues to say that she's child and what not, even going further to send his own psychiatrist to help her as well but our MC is smart and handled that thing smoothly as well like the rest of troubles that comes her way.

MC spending her first tv show salary to give the ML car for his birthday because he gave her one as well

what happened to her 40% will, her stepmother & stepsister, where's the novel actual yan yan and tang tang, or even the real Ming's daughter, etc

I was disappointed that she wasn't reunited with her agent from the original life. He was like family to her, and quickly realized that an imposter had taken over.

edit: I thought I already finished everything, but I found and read the extras, and they DO tie up the loose end with her original agent. It also explains where everyone else went - YY from book went into IRL YY (and planned to pursue Bai Chen...), TT from book went into the IRL other transmigrator (forgot her name). She was a super spoiled woman who had always been told that she was the best by her parents, was praised and pursued because her dad was the company boss, and had an inflated sense of her attractiveness as a result. That's why she couldn't handle being YY, she thought she was better than YY, and that her accomplishments were all made up by a PR team.

the FL transmigrating into a villainess or into a novel is very common but transmigrating into a fanfic novel of herself? This is the first time I've read such a plot.

The only pity is that there's no extra story about the FL's career towards directing. After all, that's her dream, right? There's also no follow up about the FL's adopted mother and who's really her biological father. Also, how did the ML recognize the wrong one given that his secretary did the DNA test? It doesn't make sense. Was it the other branches of the Ming family? What happened to them anyway?

I heavily suspect the inheritance evaporated thanks to the mismanagement of the company and the persistence in engaging in a legal battle. The shares lose value if the company goes bankrupt and there are many signs that they have heavily depreciated already by the start of the story. Not to mention that her shareholder status never comes into play despite her being very serious about accepting the responsibility that comes with disproportional gain in other portions of the story. It's very likely that the final outcome was suing for losses after dissolution of the company thanks to the malicious mishandling of inheritance by the stepmother. A win probably have the MC a lump sum of less than 10 million that contributed to purchasing the car (just enough that she did not borrow that entire sum from Mi Yue resolving the funds missing from the final calculation). The story is written from her perspective and that court battle is honestly less important to her than choosing the right gift for her uncle. The author may have forgotten this but it's more likely that this just was not a priority for the narrator considering that there IS a line specifically mentioning she no longer cares about this matter.

Personally, I would have liked to see the sisters perspective when she later grows older and understands her mother mislead her completely in this matter. Aka her regrets/face slap scene. I also wonder whether she was even the real bio daughter considering the difficulty of men to perform when blackout drunk. I'd believe it more if there was mention first of the lady stealing sperm. She was a glorified nanny and it was clear her husband had very little interest in her considering she had to resort to such methods for consummation. Tbh he wronged both his adoptive daughter and his nominal wife by doing this. Hiring a long term auntie would have been a much better choice than marrying a bride only to make her live as a widow. It's not shocking that she held resentment when she was given no sincerity in the relationship, regardless of her ulterior motives. He did not treat her as family but wanted her to treat his daughter as family. That would be hard to achieve even if she was initially sincere after years of bias towards his previous love interest despite getting married.

Tbh, I don't understand her adoptive father well. I would have been heavily suspicious of someone approaching my child with that much enthusiasm, regardless of gender.

The Uncle does not investigate the original 'mistaken' report beyond asking his assistant Jason whether there was chance for error and his assistants' assurance that their biological relation was undeniable. No one with motive to tamper with the medical documents shows signs that they are aware she is a fake niece. That her mother showed up as his brother's lover that day is never disputed to have instead been the real nieces' mother. The 'proof' from the previous timeline is untenable since that Uncle had motive to kick that Tang Tang from the family regardless of true and false. In fact, he hates his brother and is disgusted with his brothers children so the relation being true would only increase his malice towards that Tang Tang. Replacing a big trouble with a docile quiet niece would also remove the protection of bad relatives and satisfy them enough to not interfere with him taking down the 'fake' that finally pressed his bottom line one too many times. They never have another paternity test together after they miss the initial appointment that could have proved it definitively.

The MC makes a joke that proving the other girl to be his niece does not exclude the possibility that his brother had two illegitimate daughters... and she has a point. That means there is a strong possibility that this is a real in*est novel. The main couple is not willing to gamble on that possibility at all so they take the very tenuous possibility that the initial paternity test was a hospital mistake as fact all based on the assumption that there can only be one niece. The 'real' is found so she must be 'fake'. The MC on one hand passes it off as novel logic while on the other she concludes that the parallel world she now lives in is very real. A very clear act of covering the ears to steal the bell on both their parts.

Of course, the possibility that they are right about being completely unrelated is just as real. The author never confirms their relationship either, not really. I am merely pointing out that the logic they base their conclusion on is as ridiculous as the MC jokes and they both know it or it wouldn't be included in their flirting. Even if they are not related, neither is willing to gamble on putting it to a final (paternity) test. Well, or the author just wants to leave it ambiguous. They both seem too responsible to have not done a secret test before deciding to have children, although.. I'm not sure if it would have been a hurdle for them considering what the MC said to the psychologist to justify their relationship on the basis of being Uncle Niece showing her research into the topic.

All this means in the end is that the reader can decide for themselves whether to read this as a simple mistaken identity novel or as an outright in*est novel.

A car as her first gift may seem like a silly way to compensate, if it weren't for the fact that the first big gift from the ML is also a car. Not to mention that she did not consider sending him a return gift to be returning what she owed in full. She consistently makes plans to increase her value so that she can make more money for this stranger that has taken her in despite prejudice. She enjoys her career so she has selfishness, but returning to her old path is also the quickest way to earn 'enough' to thank him for such a big favor and apologize for the deceit involved by not coming clean day one. I can't hate her for it when even the ML doesn't hate her for it, and he went through some potentially unnecessary emotional struggles strong enough that he had multiple consults with a psychologist. I say potentially unnecessary thanks to his personality. I suspect he may have still sought out a psychologist even if he did know the truth, because her young age was just as big of a concern to him. He is very cautious towards love, aware of their unequal standing, and thorough enough to examine major risk factors such as mistaking interdependence for romance. Despite everything, he fell for her before she could even begin considering scheming after his body love.

Leaves a bad taste in my mouth that even if it's a fanfic, the one that took over MC's identity [the supposed heroine] had easily destroy MC's reputation.

I guess this counts as age difference and in*est kink/play? "Tang Tang" is 9 years younger than Ming Shaoyan (18 and 27) and his "niece", but Yan Yan was originally only a couple years younger than him and Tang Tang is actually not blood related to him.

It sorta reminds me of Greetings Ninth Uncle, which plays around with the temptation of in*est and age difference but it's actually not real.

Yan Yan, the FL, is a popular, highly skilled actor who transmigrates into an RPF ship fic about herself and another popular younger singer. However, rather than transmigrating into herself, she transmigrates into the fic's OC villainess, Tang Tang.

Tang Tang's purpose in the fic is to be the annoying 2nd FL who pursues the fic's ML and tries to sabotage fic!Yan Yan, but she also has her own extremely dogblood background. First, her mother got pregnant from an unknown man, and left her (TT) with her childhood sweetheart before committing su*cide. Then, her adoptive father marries and has a child with an employee from his company, before dying from cancer when TT was around 7. Her adoptive stepmother reveals her true colors as a bit*h and both her and her daughter treat her badly. Then later on she gets mistakenly claimed as the niece of Ming Shaoyan, one of the fic's side MLs, who despises her and her "father". Dumb Tang Tang gets tricked by the rest of the Ming clan into trying to take down her uncle. She finally loses her life when MSY finds out she's not his real niece, and is implied to have organized for Tang Tang to get into a drunken car accident by tampering with her car's breaks.

Yan Yan, now Tang Tang, transmigrates at the point where fanfic!TT is at rock bottom and is just about to be summoned by Ming Shaoyan for the first time. She's now the most hated female celebrity, but even worse, someone else has transmigrated into fanfic!Yan Yan, a girlfriend fan of the young singer who knows nothing about acting but is determined to finally be together with her idol. Yan Yan as Tang Tang has to somehow reverse her fate while also dealing with the discomfort of not only being her own "enemy" but watching her enemy destroy everything about "Yan Yan".

the romance started in the latter part. Maybe around 50 chapters. Though at the very beginning they basically live at the same house but the story focuses on FL's progress. Then suddenly at chpt 40s, ML somehow has feelings for her hahah, quite random I admit

then FL has feelings around 50s if im not mistaken

also, since FL knows the real story, she confesses first. And ML did the same, which is to call a psychologist for her ahahahha