emeraldarrows

Both dramas have a human FL who ends up "housing" the pearl/stone of the supernatural ML. While the ML tries to figure out how to get it back, the two end up working together.

Both dramas feature nine-tailed foxes.
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Both MLs are fox spirits and the FLs are mortal.
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Both MLs are fox spirits whose beads are swallowed by the FL. The two then end up working together and fall in love.

Both MLs are white foxes whose beads are swallowed by the FL. The two then end up working together and fall in love.

Both dramas have the FL returning back in time multiple times and attempting each time to prevent the tragedies that happened before.

Both dramas have the FL returning back in time and attempting to prevent the tragedies that happened before.

Both are about a student falling for their teacher, with the difference being one is an age gap while the other mains are close in age.

Both are historical mini dramas with an assassin FL.
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Both are historical mini dramas with a FL who is an assassin after the ML at the beginning. The two then fall in love.

Both are set in school with an awkward FL and a ML who helps her pursue her crush/love while both of them fall in love with each other. Both MLs initially have a phobia/distrust of girls.

Both have a school setting and begin with the FL re-inventing herself. Both MLs are popular students.