emeraldarrows

Both MLs are allergic to people, order a robot, and the FL ends up replacing the robot.
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Both are mini dramas in which the ML swaps identities with his identical twin brother.
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Both leads have complicated identities which put them at odds with each other, and ML is in possession of something the FL needs that if she takes it will cost him his life. Both dramas have ambiguous endings with the leads within the world of a painting.

Both FLs are betrayed by the man they love and die tragically, only to find themselves in the past. They become close to the ML, someone they knew only briefly in their original life.

Both are more serious BLs in which one has a difficult life. Both have similar vibes.
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Both are set in school and about the MLs creating a team to make a film in order to impress a girl he has a crush on.

Both FLs disguise as a boy to enter a place that only admits men. Both MLs have a hidden identity as well.

Both are Republican Era mini dramas in which the FL wrongfully blames her former fiancée for murdering her family and returns under a new identity to take revenge.

Both are xianxias in which the FL has a hidden powerful identity even she is initially unaware of which puts her at odds with the ML. Both are bittersweet stories.

Both are dystopian settings with unique worldbuilding.
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Both are historical drama specials, one of which tells the story of Prince Sado and the other of which tells the story of his son Prince Yi San dealing with the aftermath of his father's legacy.