Both are about a modern day FL who enters a fictional historical world, bonds with her new family there, and comes up with clever ways to support them in the countryside, all while falling in love with the ML.

Both are mini dramas with a rich person who ends up in the countryside and stays there for a while, learning how to live and falling in love with one of the locals.

Both are Korean fantasy/historical dramas in which the main characters have magical powers and a similar style of hair/dress. Both have strong wuxia influences.

Same story, different version. Both are based upon the manga with the same characters and general plot but have different interpretations of the story.

Same story, different version. Both are based upon the manga with the same characters and general plot but have different interpretations of the story.

Same story, different version. Both are based upon the manga with the same characters and general plot but have different interpretations of the story.

Same story, different version. Both are based upon the manga with the same characters and general plot but have different interpretations of the story.

One is the drama, the other a spin-off with additional stories with the characters.
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Both have shamans, dark magic, and evil, as well as a royal lead under some sort of a curse. Both dramas have a similar vibe.

Both have a palace setting, dark and unusual vibes, and a star-crossed romance, as well as powerful shamans.

Both are mini dramas in which the couple is married and happy, and then the ML is seemingly killed in a tragic accident that may have been murder. Years later, he returns, pretending to be his identical twin brother, to solve his "death". The FL is increasingly suspicious and gets a DNA test which the ML switches to hide his identity.