Both are light historical romances with the couple falling in love after marriage. Both have cosmetics shops.

Both dramas feature contract relationships (siblings vs. marriage) that turn into true love. The FLs are quirky and endearing, the MLs seemingly cold but very warm hearted. Both couples sell skin care products, and both are wrongfully blamed for causing allergies on the people who buy them. Both are light, fluffy historical romances.

Both dramas begin with the ML killing the FL, then she is reborn/comes back to life. At first she fears the ML but over time falls in love, and the ML softens and falls for her as well.

Both are fantasy/historical dramas with a similar vibe/feel. The FLs are cute and endearing, as well as non-human, and the MLs are in a position of power and initially seem cold.

Both are about a modern day FL entering the world of a story and falling in love with the fictional ML.

Both are short dramas about a modern day FL entering the world of a novel and falling in love with the fictional ML.

Both are short dramas about a modern day FL entering the world of a novel and falling in love with the fictional ML.

Both are short dramas about a modern day FL entering the world of a novel and falling in love with the fictional ML.

Both are about a modern day FL entering the world of a story and falling in love with the fictional ML.

In both dramas, the FL is from the real world and accidentally enters the world of a novel where she and the ML were antagonistic toward each other. However, her change of personality causes them to fall in love instead.

Both are short length dramas with a real world FL entering a story and trying to change events to her advantage. Along the way she falls in love with the ML.

Both are films about people battling alien monsters. One is entirely set in history, while the other is partially historical.