Both movies have a similar feel and trajectory of the plot, with the leads meeting at school, initially seemingly mismatched, and then growing close. Both MLs are trouble makers and FLs have an unstable home life in some way. Both MLs fall first and FLs break their heart, causing the two to separate for some time before an eventual reunion.

In both, one of the leads has lost part of their memory and later learns they are a genetically altered person, while the other lead, who is a human with a cold personality, is searching for information on their parent(s) death(s) who were scientists and died under mysterious circumstances. In both, it's revealed that the scientists tried to save the other lead before their murder. Both dramas have a similar moody and dark aesthetic.

Both are historical mini dramas in which the FL marries a man in order to take revenge upon him for her dead family. She soon becomes romantically involved with the man's son.

Both are historical dramas in which the MLs are matchmakers and the FLs are matchmakers or become matchmakers as well. Both FLs hope to marry well or for love, but unexpectently fall for the ML, while the MLs are hired by another man to match the FL to them, but end up falling for her themselves. Both dramas begin with one of the lead wrecking a marriage.

Both FLs are bold and cheerful matchmakers who find love with someone unexpected. Both are historical dramas.

Both are light historical dramas in which the FL is an optimistic matchmaker determined to succeed in her profession against the odds. In both dramas, she finds love with someone unexpected.

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Both FLs travel back in time and open a restaurant while falling in love with the mysterious ML who they become engaged/married to.

Both are romantic/comedy dramas in which one of the leads shapeshifts between being a dog and a human, with the other lead initially unaware that the dog and human are the same.

Both are about the relationship between one of the leads who is human, and the other lead who is a cat/human shapeshifter.

Both are about the relationship between the human FL, and the ML who is a cat/human shapeshifter. The two live together and fall in love.

Both are about the relationship between one of the leads who is human, and the other lead who is a cat/human shapeshifter.