I Want to Live to the Finale (2021)

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

Both are short length dramas with a real world FL entering the world of a novel and falling in love with a character in the story. Both have guides who give them tasks, and both FLs must change their fate and survive to get home.

Both dramas have a real world FL entering the novel and trying to change her character's fate since her character is supposed to die in the story. The FL in both is married to and falls in love with the story's villain who begins to change as he falls in love with her.

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

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

Both are short dramas in which someone from the real world enters the world of a story and must change things to survive which leads them into a relationship with the villain.

Both are short length dramas with a real world FL entering a fictional historical world where she must change her fated death and survive. Both have antagonist/villain MLs who the FL falls in love with.

Both are short dramas in which the FL enters the world of a story and ends up altering the plot, sometimes intentionally. She also ends up falling in love with the villain of the story.

Modern day FL enters a historical fictional world, and falls in love with the antagonistic or villain ML.

In I Want to Live to the Finale, a woman accidentally enters a (comic) book world and is replaces a character who falls in love with the ML.
While in Night of Love With You, our FL is usually assigned to enter these worlds, they share the similarities in the sense that both FLs in IWTLTTF and NOLWY are not from the book worlds. They both fall in love with male counterparts in the book worlds.

Both are about a real world FL who enters a novel where she's a character.
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Both dramas have a modern or future FL entering a fictional historical world. Both MLs are villains who the FL becomes entangled with.

Both are short length dramas with a modern day FL entering the world of a historical novel. The couple is originally antagonists in the story.

Both are short length dramas in a Republican Era setting with a domineering ML. One has fantasy elements and the other doesn't, though.

Both are mini dramas in which the FL enters the world of a book or comic book. Both have the same actress as the FL and a Repubican Era setting.