emeraldarrows

Both are Republican Era dramas in which the FL approaches the ML as part of her revenge plot of taking down his family who destroyed her family.

Both are Republican Era dramas in which the FL is trying to right the wrongs done to her family, and the ML is a somewhat dangerous figure who she becomes involved with.

Both are Republican Era dramas centered around the FL's revenge plot.
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Both are Republican Era mini dramas in which the FL is out for revenge and becomes entangled with the ML in the process.

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Both are historical dramas in which the FL uses scents/fragrances and the ML is in possession of one she needs.

Both are historical dramas in which the couple briefly met years before, leaving an impression on the FL. Later on, she accidentally marries the ML, joining his large house, and discovers he's now foolish/pretending to be foolish.

Both are historical mini dramas with a tough FL and a ML who pretends to be foolish.
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Both MLs were abducted as a child and bonded with the FL. In present day, they don't recognize the FL as the little girl from their past, but their trauma/phobia is eased whenever she's around. The two live together.

Both leads have a shared traumatic childhood experience that affects them in the present in some way and only when they are with the lead can they recover.

Same cast, different story.
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Both FLs are food bloggers/critics and MLs are talented at cooking/baking. Both are simple, sweet romances.