![](https://i.mydramalist.com/BjZj6t.jpg)
![](https://i.mydramalist.com/kbQdr_4t.jpg)
Plots of both stories are really similar. Both are about unfortunate love in Joeson era that repeats again in our time to have happy ending. There is a little of fantasy also: mysterious time travelling in Rooftop Prince, and mermaids in Legend of the Blue Sea. Main characters have troubles adapting to modern world. And after all both series have charming love story.