Ok, this is a weird one, at first I thought it was crap, it was just extreme shoujo, all the cliches of the genre at max level with an over the top principesque and fairy art style. Fortunately after 5 or so chapters the manhwa gets into it's rhythm, and after having laid it's foundations it throws all seriousness out of the window and goes full parody and comedy. I usually don't like stories that don't take itself seriously but when done to this level that all is there for the comedy I'm ok with it (if its funny I mean). The author doesn't forgive anything if he can make a joke of it and I think it works well and it's quite funny too, it was a bit of hit and miss at the start but I had some good laughs as the story picked up pace.
Story-wise, there ain't much there but there is an overarching story there, a subplot of sorts, which progresses slowly along the more episodic comedy. Still, there are only 56 chapters so I'm not so sure where it's going though I could make a guess.
Chars are also caricatures of shoujo cliches, starting with the MC that's a shoujo novel hardcore fan who takes this so far that even when reincarnated to a world inside a novel, she uses all her knowledge of the novels she read to enjoy the drama live. Same for the male leads, "look at me, I'm gorgeous, I'm the center of the world, oh someone has not fallen in love with me at first sight, I'll make her Ofu! at me no matter what!" that's the prince... "what, you don't know me? the center of the universe? inexcusable!" that's the Duke (also, has woman phobia except for the original heroine). The two more interesting characters are the original heroine and the mage, she because there is something behind her "perfect act", him as a sort of anomaly in the storytelling.
Same goes for the art, that fairy style is also used to further the irony and there are myriads of deformed faces and bodies, at times quite funny.
So not for everyone I guess but I would recommend anyone who gives this to try persisting till ch 20 at least. For me it has been quite funny so far with some boring and some hilarious moments, think a shoujo version of "My brother has a pit on his head".