LeeMaRi1999
blurb is too wordy in a bad way. It sounds like rambling. You need to separate some of the sentences into shorter length.
After a certain mermaid was not able to bring herself to kill the prince and dissolved into a foam, she found herself reincarnated as a mermaid spirit in the 21st century in South Korea. She has achieved what she has always wanted, and that is to become a human, but when someone splashes water on her bare feet, she becomes a mermaid. In this life, she found out the evil sea witch's descendant was a man who happened to be able to transform himself from a fisherman's son to a rich businessman and the CEO of the company that she's currently working on. But then, she has to successfully make the prince, whom she vaguely remembers his face, fall in love with her within 100 days to become human again. Chaos arrives when she finds herself torn between the two people who made her life miserable. Will she be able to carry out her mission to make the reincarnated prince fall for her or will she fall in love with one of the two along with the process?
After a certain mermaid was not able to bring herself to kill the prince and dissolved into a foam, she found herself reincarnated as a mermaid spirit in the 21st century in South Korea. She has achieved what she has always wanted: to become a human. Still, when someone splashes water on her bare feet, she becomes a mermaid. In this life, she finds (use present here, because blurb) out the evil sea witch's descendant is a man who happens* to be able to transform himself from a fisherman's son to a rich businessman (this part is extremely confusing, happens to be able (is wordy) but it also means something that could happen again, especially the "be able" part, in your context, you're saying that he DID transform himself, which would be better phrased as: She finds out... a man who managed to transform himself (climb the ranks) from a fisherman's son to a rich businessman.
He is also the CEO of the company that she's currently working on. Yet, she has to successfully make the prince, whom she vaguely remembers his face (so unnecessarily wordy), fall in love with her within 100 days to become human again. Chaos arrives when she finds herself torn between the two people who made her life miserable. Will she be able to carry out her mission to make the reincarnated prince fall for her or will she fall in love with one of the two along with the process?
You have way to many prepositions in the same sentence and some are used incorrectly. You want to use present tense for summary/blurb, and past tense for novels.
I might just rewrite this for you:
After a certain mermaid fails to kill the prince and tragically dissolves into sea-foam, she finds herself reincarnated in 21st century, South Korea. Finally, she has achieved what she has always wanted: to become a human. Still, whenever someone splashes water on her bare feet, she reverts back into a mermaid. In this life, she finds out that the evil sea witch's descendant is a man who managed to transform himself from a poor, fisherman's son to a rich businessman and the CEO of the company that she currently works for. At the same time, she has to successfully make the prince, whose face she vaguely remembers, fall in love with her. With only 100 days on the clock, she has to find a way to become human again. Chaos ensues when she finds herself torn between the two people who had made her life miserable. Will she be able to carry out her mission to make the reincarnated prince fall for her or will she fall with the evil witch's descendent instead?