Două Surori pentru un Prinț (2012)

The setting is the same. Both dramas have the same feels, since in both dramas a rich guy (in rooftop prince the guy is a prince from the Joseon era who ends up in modern-day Seoul and in Shopping King Louis the guy is the heir of a conglomerate) becomes poor and has to learn how to live a normal life with a poor woman who takes care of him.

Both have a male character who time-travels and interacts with a female lead from modern day Korea/Japan.

They both are about two sisters that get seperated, although in rooftop prince it was intentional and not accidental. Both female main leads have amnesia too from accidents.

I recommend this both drama because , Male lead and Female lead
try to solve problem
In one drama explosion and another student murder/suicide

Both have people who time travel and fall in love with someone from a different time.

It was a funny Korean Drama too..

With the loss of the protagonist, the other party takes advantage of the situation to be at the top.

I looked through recommendations and cant agree with many of them.
I think not only period drama and time travelling ones should be recommend, but show with similar mood.
So, close to this drama is the Rooftop Prince.
Both are funny, still different. Both have time travel, including mix period and modern.
I would say that humor in My Only Song is close to Waikiki, but the Rooftop Prince is just regular drama with regular plot and with lot of funny moments. In My Only Love Song plot is not the base of drama, the humor style is the base.

They are both about ancient people time traveling to modern times. They have the same quirky feeling of how to adopt to modern technology and how to solve their own mysteries.

Both has Time Travel.. On both one of the couple is from an old era, On Rooftop Prince he is from Joseon Era, On Scarlet Heart modern girl travels back to Goryeo Era. Both has got great love story

It is similar from the concept as both the drama are about time travel. In Emperors and Me, three emperors travel to modern time while in Rooftop Prince, the Prince and his subordinates travel to modern time.

In both dramas they have people from the past coming to the future.
In RF it is the prince and his bodyguards that come forward in time.
In DA it is two women that come from the Joseon era into the future.

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.

Both dramas have themes of reincarnation and who you are fated to meet. In Next the main part of the story is set in modern times with long flashbacks to several historical settings. We're talking 2-episodes for each flashback; they're like mini-movies within the drama. Seriously, it's worth watching just for the flashbacks.

Both these dramas have many things similar like male lead being arrogant, development of love between the leads, 3 boys and 1 girl staying together and caring for each other,etc...
Both stories have entirely different plots but they somewhat give you the same feeling...
You're beautiful is idol drama whereas rooftop prince is a historical and fantasy drama
While i was watching you're beautiful it made me laugh too much and at the same time cry also...i had the same feeling in Rooftop prince also