The title is a bit misleading, it makes you think that it is a Romantic Fantasy comedy but instead it has noir implications complete with a serial killer
The Fantasy Story is there because he is Cupid bound to live among humans for 500 years waiting for the last Metamorphosis to return to his place but something goes "wrong" and so he meets a beautiful vet who however turns out to be the love of his life precisely for him who cannot have any ties, especially with humans. However their story between ups and downs, memories and tragedies will have the right ending.
The story of the killer is also well told and until the end you don't expect the killer.
Nice chemistry between Jang Dong Yoon and Nana nice kisses, some comedy and some tragedy but overall a good drama to watch!