Both have a protective relationship between the leads that begins as adoptive siblings and then evolves into a romantic relationship with the ML falling first. Both have a SML who has a one-sided love for the FL but respects her choice and helps the couple.

Both are short length dramas about a star-crossed romance between a pair of adopted siblings who fall in love as adults.

Both couples grew up together since childhood as adopted siblings with the ML falling first and becoming both possessive and protective of the FL.

Both are mini dramas with a rich ML and a chef FL. Both couples have good chemistry and ML is deeply in love with the FL.

My Boss is an adaptation of the same story as Marry My Husband, just in short length form with some changes.

Both have a celebrity and a non-celebrity of opposite genders who accidentally bodyswap and must work together to figure out how to swap back.

Both are mini dramas in which the ML has a secret identity/connection to a rival sect. Both FLs are thought of as devils involved with many men, and the MLs are brought as their concubines.

Both have a seaside setting. One ML is a resident, the other a stranger who arrives. The MLs have a grumpy/sunshine dynamic and come from very different worlds.

Both are historical dramas that involve a power struggle over the throne and a love triangle between two royal brothers. In both, the heir to the throne is presumed dead when young and returns, and the other brother, now on the throne, attempts to kill him. Both FLs come from a powerful family but are caught in the middle of their love for the ML and friendship/brother-like relationship with the SML.

Both have a similar vibe and cover a similar period of history, as the people struggle with the Japanese occupation and then adapting to American ways of life. Both FLs are similar in personality - young, but very strong and determined.

Similar setting, both portray the struggle and courage of the people against the Japanese occupation. One has fantasy elements, while the other is realistic.

Both FLs come from the modern day real world into a historical world where they at one point are a servant, and at another pose as a man/are in a man's body. Both MLs are emperors who fall deeply in love with the FL, but realize she must return to the real world.