Recommendations

Other than sharing Lee Sang Yi in both shows, both shows focus on the people's relationships.

Natural, easy going, not much dramatic filled moments.

Slice of life dramas with romance, and filled with colorful supporting cast.

Both share cold and aloof female leads, who both share trauma that makes them that way. Both take a while to thaw out their pain to be happier in the end.

Japanese Version, so same storyline for sure.
- RomCom
- Hidden Identity
- Quirky FL Personality
- 2ML is awesome

This one IS my favorite version of this drama. Short, fun, and adorable actors!

Chinese Version, so same storyline for sure.
- RomCom
- Hidden Identity
- Quirky FL Personality
- 2ML Syndrome

This one is not my favorite version, but it is okay :)

Korean Parent Story, so same storyline for sure.
- RomCom
- Hidden Identity
- Quirky FL Personality
- 2ML Syndrome

This one is not my favorite version, but it is okay :)

In both movies the protagonist has the special ability to "see death" and in some cases try to save people.

*both have medical related
if you are a fan of medical then you should defi watch this. it's a lowkey drama with romance

In both the dramas, Female chases male first and it has similar vibes at many places. Even the posters look similar.

Similar vibes

BOTH:
man and girl/kid form a heroic relationship
man is hero
girl/kid becomes damsel in distress
action packed
genres: action. thriller, crime
very strong male lead
male leads are avenging the death of someone close to them

DIFFERENT:
avenge death of his family in Revenger
avenge death of the little girl's family

both prodigy doctors. specific surgeries that can`t be done by just anyone. both have a lost love that they meet again and get the chance to clear the air with that lost love. both have a rivalry with one of the doctors that they meet at the hospital they go to.

Movies by Wong Kar Wai about different sets of people with romantic tension (eventhough it stays unfullfilled alot of the times) that overlap. Theres also action scenes in both.

The mine drama revolves around the murder of a man {Hanji young} and he's proved as major antagonist with a trail of lies and evil deeds behind the fake identity of being a good husband and responsible father. In High class drama we put up with similar situation but the only difference between them is the truth was revealed before death in Mine whereas , the wife explores the miser of truth after her husbands death in high class.
Both dramas spins around the supreme wealthy class with a mask of smiles burdened with endless sins and evil within.
Yet it isn't proved in High class though protagonist's husband had an affair and even in Mine the han ji young had secret affair.
Both dramas had sons with malicious father with a history of misdeeds behind them.

I hope the explanation may fulfil the requirment.

I will say that even the plot is not similar but it will give you the penthouse vibes
Rich people will do anything for their greed
Upper class parents especially mothers will try their best even illegally for classy education for their children.
Both of these dramas will keep you on the edge its a one time watch (as penthouse has 3 seasons so it has more episodes to understand the plot)

Similar to Good and Evil in Eternal Love of Dream
In G and E, FL (female lead) loves the ML and get punished to reincarnate to be human and mets with male lead because of fate and starts a adventurous love story.

Similar here spanning across three lives in three worlds. And adventurous love story of three live.

Eternal Love of Dream plot summary :

The books describe the love story between the nine-tailed fox queen of Qing Qiu, Bai Feng Jiu, and the first ruler of Heaven, Dong Hua Di Jun, spanning across three lives in three worlds.

- High school drama
- Classmates
- Hate to love
- Smart male lead
-FL gets transferred to ML school
-Childhood betrothal
- Bickering second couple

- School drama
- Youth
- Romance
- Friends to lovers
- Classmates
Both has similar vibes and has nostalgic feel