Recommendations

The plot is quite similar
The drama is about the entertainment industry and productions
The leads are past acquaintances and there used a be an unrequited love between them
They see each other again after years and their relationship blossoms

Has similiar episodic format. Both dramas showcase how they pay respect to the dead but in different ways.

Both are queer love stories with a main character able to control/reverse time, with cool vfx when time-travelling. The main theme for both shows is regret and loss with the cost of love, and resetting things to aim for an ideal outcome.

-both had children involved
-years of separation after misunderstanding
-male lead with illness
- initial hatred from ML for revenge after reconnecting

Both are historical dramas in which the ML is ill with a short time left to live that he then shortens saving the FL. They are weak physically but strong mentally and in both dramas are involved in the power struggle for the throne. Both MLs are doctors or work as doctors for a time. Both FLs misunderstand and are separated from the ML for a long time.

Both have a similar plot of the FL marrying the prince who then becomes the emperor. Both FLs become trapped between the two royal brothers as well as the emperor's evil concubines. Both FLs lose at least one child due to the emperor, and are believed to have lost their fertility as well (in the movie BCTSAL the FL learns she is pregnant again). A lot of both dramas are set within a palace and the FL undergoes a lot of hardship and emotional growth.

The supernatural experience in the medical field is present in both creations and the idea of crime and the supernatural helping to solve the conflicts surrounding the hospital's administration or higher ups.

Liar game is a japanese drama with a lot of mindgame, if you liked Squid game you should really watch Liar game.
Both have a similar plot, it's money game ruled by secret organisations where you can finish rich or.. you know

The female lead in both the dramas suffer from inferiority complex about their appearance. The male lead falls first both in mask girl and true beauty:)

When I first saw Something About 1%, I was so pleasantly surprised by the female lead character. Even though she was "poor" teacher (in comparison to "rich" CEO heir), she was not the usual cliché. She was smart, strong, no nonsense woman. Here the FL is the same and they both did not let the rich guy's mother/aunt/ex scare them. Just the opposite....

One is the drama, the other the finale movie which gives it a proper ending.
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Both series have:
-characters that work in an office.
-one character that is trying to ignore/move on from the love they feel.
-nice characters that make each other happy and healthy.
-simple plots and they are short. They focus heavily on the two male leads and their story together, we dont get to know anything really about family or friends.
-give off similar vibes. They are feel-good and sweet but they have some problems that they talk about.

Both share a FL running an inn/boarding house, a ML who lost his father which causes him to hide his identity, & a family secret.

While this one seems more lighthearted in a way, Come and Hug me has the same FL lead and its crime heavy. While there is not time travel involved, I think the style and telling of these dramas are similar. Come and Hug Me is a more angsty slow burn however, I think they are pretty similar so if you haven't you could always give this one a try!

It's all about first love. Both of them met in the young age and they started a beautiful story of first love. They were both also separated from each other because of unexpected factors in their life.

The difference = the adult version of 2521 didnt meet and it wrapped up as first love story without reunion. Hatsukoi got happy ending and both of the leads are ended up together.