Recommendations

Both dramas are based off webtoons that have the FL go back in time and get revenge on her husband/boyfriend and sister/best friend.

Perfect Marriage Revenge has:
FL is the adopted daughter of a wealthy family and she is mistreated by her mother.
After an accident and being killed by her mother, the FL wakes up and it is one year in the past.
She vows to get revenge on her family.
The ML and FL get together really early on and it's about them working together to get revenge.

Marry My husband has:
FL has cancer and not long left to live. She walks in on her husband cheating with her best friend. They kill her and she goes back in time 10 years.
She realises that everything is inevitable; if she avoids an injury, someone will get it somehow. This makes her realise that someone has to marry her husband and be killed by him.
She sets out to have her best friend to take her place.

Both movies are about animals and aspiring vets. Both are very similar...........................................................................

Both are about childhood friendship and future romance between a girl and a boy aspiring to become guitarist, over time. Both are very similar...........................................................................

Similar constellations, but different era

-a woman gets married for revenge and political reasons
-the son/son-in-law of her new husband gets between the mismatched couple
-tensed situations and life threatening moments ensue

Not exactly the same but in this drama people cannot hide their true feeling or attraction towards each other . It is a good drama

Ahn Bohyun's action drama is always a treat. Both dramas have strong female lead who fight with him against injustice.

Not recommending, just putting it on here because it’s almost identical. It’s almost the same plot and both are only two episodes long. I’m sure this was the inspiration for Love on Lo. It’s too similar not to be.

Yeohwa at day : Kang Mina
Yeohwa at night : Jo Yeonju

Yeohwa and Yeonju may have different morality and motive at first, but both of them bravely fight against injustice. Lee Honey rocks these roles

Both series deftly combine the monster and period genres to create a high-stakes story with a nice balance of suspense, political intrigue, and action.

Both feature mermaids and evil humans causing environmental problems for the ocean which the mermaids are trying to stop.

Both of these censored GL microfilms take place in the republican era, with risk and larger plans making the developing romance hard to navigate.

In both of these censored GL microfilms, one of the female leads crossdresses as a man to fulfill a certain agenda, and finds love in the meantime.

In both of these censored GL microfilms, two women on opposite sides of a conflict unwittingly come together and develop a fondness towards each other that trumps their family loyalty.

Both are xianxia dramas in which the FLs are plant fairies and the MLs are doctors with a cold personality.

Both are xianxia mini dramas in which the FL is a cheerful plant fairy and the ML has a cold personality.