I. The Good
There's an unequivocal happy ending.

The plot is fantabulous. It's a refreshing take on the 'cannon fodder realises they're merely fictional characters; hugs big thigh to survive' trope. The FL refuses to succumb to her role as the evil cannon fodder, and stubbornly pits her wits against the Fortune Author once she discovers that she can push the storyline so long as the ink is not dry yet. The plot doesn't whitewash the FL as a misunderstood 'good' person. She is no meek, timid, mealy-mouthed damsel in distress. She is pragmatic, conniving, and arrogant, and will lie, cheat, and steal as means to an end. The FL commits all kinds of evilry to get the Big Thigh ML on her side and to ensure her own survival. Mr Big Thigh ML falls in love with the FL, sins and all, recognising that everyone has their good side and their bad, and she's just more honest about hers. The storyline constantly subverts expectations (e.g., the FL really isn't a 'good' person, the 2FL isn't really a 'bad' person, the various pot shots at cliche tropes).

I really, really loved the swipes taken at cliche tropes. In episode 9, the FL questions the need for people to hide in bathtubs. In episode 11, the doctor complains "Don't you think accidents happen to you too often? Two days ago she was poisoned, and today she's been shot!". In episode 13, when they were unable to feed the passed out ML medicine, and the 2FL is about to feed the medicine via mouth-to-mouth, the FL says "You couldn't get it in using your hand, but you can using you mouth? Do you think he has a special mouth-opening switch that turns on with a kiss?"

The costumes are gorgeous and intricate, even when the FL is dressed like Minnie Mouse in a few scenes. The details in the sets are superb, e.g., the delicate painting of cherry blossoms behind the ML and the exquisite lamp designs. The production team committed their entire music budget to one song, and it produced a beautiful, poignant melody with melancholic tailored lyrics that really elevated the scenes to full-length drama level.

LMC's acting as the FL has improved significantly, although she struggled in some scenes to emote sufficiently. Surprisingly, YSJ made a believable ML, which is a credit to his acting chops because his babyface was really difficult to get past, which leads me to the bad.

II. The Bad
YSJ's babyface had me struggling to believe he was supposed to be the merciless and ruthless ML. However, the combination of his acting skills and the strategic camera angles helped to glaze over this, especially during the steamy scenes (otherwise the audience would uncomfortably feel the need to sit in jail).

ZMY's acting as the 2FL was hard to watch. I get that she's supposed to play the ingénue role, but all she did was stand there widening her eyes and pouting her lips for every scene. The only time she came to life was in the last episode, when she and the FL are huffing at each other.

III. The Ugly
This drama is not for the liberals and for those who are triggered by some events due to some plot devices. The FL fakes a rape attack to trick the ML into taking her home with him. The FL physically harms herself and threatens suicide more than once.

There are also missing plot points, e.g., why or how did the Fate Book fall into the FL's hands, how did the ML break out of the Fortune Author's hold, when or why did the ML regain his memories.

IV. Verdict
I really enjoyed the constant subversion of expectations and will definitely rewatch this. For this drama to be pleasurable, you must not think too hard. It does make you examine why you think that only 'good' people deserve happy endings when really, most of us have our deep, dark thoughts that we never share because we're afraid of being marginalised and in all actuality, we would do the same as the FL.