emeraldarrows

Both MLs are powerless princes in a palace controlled by the royal minister who is believed to have/attempted to kill the FL, ML's love.

Both MLs have heart conditions and a past connection with the FL. Both dramas involve a character (ML vs. SML) discovering he has a young son he didn't know existed. Both dramas have a similar feel.

Both are light hearted historical dramas in which the FL is an assassin ordered to kill a royal. In both, her attempts to kill the ML/his family are thwarted by him every time in comedic ways.

Both are mini dramas that feature a magical inn/hotel where spirits pass through.
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Both are mini dramas in which the FL has extraordinary strength and is a bodyguard for the ML.
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Both are mini dramas in which the FL has extraordinary strength and is a bodyguard for the ML.
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Both FLs are small but extraordinarily strong and become bodyguards for the wealthy ML.
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Both FLs are city celebs (of some sort) who visit the countryside and fall in love with a local farmer.

The second season finishes the story.
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Both dramas are gender flipped mirrors of each other - the FL/ML ends up involved with the very popular 4 MLs of his/her high school, leading to an unexpected romance. The ML of STJAGINCT isn't a bully, though.

Both are Republican era mystery dramas with fantasy elements and a very similar vibe. Both MLs are talented investigators who have suffered personal tragedy. Both FLs pursue ML to the city after a meeting in the past. Both dramas have at least one case involving a stage magician's act that results in a murder on stage.

Both FLs are pregnant/give birth and have to find out who the father is from a trio of possible men.