emeraldarrows

Both are short length dramas with a real world FL entering the world of a story. The ML is initially antagonist and tries to kill her.

Both are short length dramas that have the real world FL entering a fictional world and falling in love with the story's villain.

Both are short length dramas with a real world FL entering the fictional world of a story and falling in love with the villain.

Both dramas have a modern day FL entering the world of a historical novel and falling in love with the villain or the character she originally hated.

Both are short length dramas with a modern day FL who enters a story and falls in love. The couple are antagonists within the story.

Both dramas have a modern day/future FL entering a historical fictional world and despite assuming they should end up with the ML, they end up falling in love with the villain.

Both have FLs from the real world who enter a fictional historical world (novel vs. screenplay) and become involved with the story's villain, all while trying to survive the plot and return home.

Both dramas are about the FL entering a screenplay into a fictional historical world where she is a supporting character. The FL then tries to return to the real world by controlling the story and falls in love with the story's villain.

While one is historical and the other modern day, both dramas have a determined FL who is a single mother (either biological mother or aunt/adoptive mother) to a precocious little boy. The child takes a liking to the ML at the beginning and calls him his martial arts disciple. The ML has never met the little boy before but is related to him (father vs. uncle) and quickly steps into the role of father, all while falling in love with the FL.

It continues the series.
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Both dramas have a ML who is a supernatural creature (nine tailed fox vs. merman) and a human FL who accidentally kisses him and swallows his pearl/bead. In order to retrieve it before it kills her, the two end up living together, and fall in love.

Both are love stories between a mermaid or merman and a human. The mermaid/merman's life is attached to the human.