Emperors and Me (2019)

In these 2 drama, the main actress went in the past or a ancient dimension/world and meet her prince. Love and hate was involved and they found love through struggles.

Both female lead was dragged into the past or different world and learn to adapt and create love with the prince

Both dramas have a king who travels to the present and later also to the past. Both romantic comedies.

One of the main lead was dragged into a different world in a set of time and discover their love and difficulty. Set timeline in ancient and modern time.

The concept is somewhat similar where both leads time travel to each others' world with an unknown reason. Hence, they try to figure out what is going on and how to travel back to their own worlds. Along the way, they end up falling in love with each other.

Travel to the past and fell in love in that era. Takes place in modern and ancient time. Both female lead fell in love with the male lead but cannot face the truth.

The main leads in both stories time travel to different eras- meeting prominent historical characters e.g. the Qin Emperor. Love transcends lifetimes storylines with alike magical elements e.g. immortals.

Both have a similar vibe though The Eternal Love definitely has more slapstick comedy. Traveling to an ancient world? Check. Ancient man adapting to modern society? Check. Honestly both equally amazing dramas to watch.

Emperor or Boss is a super cute shorter drama with a surprisingly fun plot/ plot twist. It involves a mysterious emperor that somehow lands in modern society due to a wish in a strange journal. They embark on their journey, both female and male lead helping each other in ways that will benefit both parties. However, adapting to this new world is harder than it seems and on top of that, her boss is involved?? She tries her best to keep everything going, and to not lose her job in the process. Although, this is mostly centered around the modern era setting we get to see a fusion of ancient china/wu xia vibes. Both incorporate the use to an emperor falling into modern society, adapting and naturally falling in love. It's super cute to see their interactions and how the differences they bring to modern society. Emperors and me, gives you multiple dynasties, a longer and more intricate plot including a change in modern vs ancient times setting.

Same time travelling wuxia romance but with better plot, more chemistry, better ending, and more Kisses!

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.