emeraldarrows

Both are historical mini dramas in which the leads are investigating a murder mystery together that connects to the past massacre of one of the lead's family.

Both are historical/fantasy dramas in which the ML was once a deity but is no mortal with no memories on earth. Both FLs are cursed or believed to be a curse.

Both have a deity falling to earth, losing his memories, and undertaking a task/goal with the help of the human FL who he falls in love with.

Both are set in the same era and portray the sufferings of the people under the same historical tyrannical king.

Both are different adaptations of the same story, one told in movie form, the other as a short length drama. The drama's FL is more mature and warmer, though.

Both dramas have a visually impaired ML and a FL who opens up his world.
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Both have a wealthy, visually impaired ML with a domineering personality and an upbeat, poorer FL who brings him out of his shell after being hired as his helper.

Both MLs are blind and withdrawn. Both FLs open up their world.
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Both are historical with a rich, brutally gorgeous aesthetic. Both feature clowns and a king on the edge of insanity.

Both have similar concepts and themes - a ML or SML who has been chained up for decades, people living in an area with an evil miasma, and characters that are shades of grey. Both MLs are accused of being demons and hunted down by the "righteous" sects/people.

Both are short (drama vs. movie) and are about a real world FL entering a fictional historical world with VR elements and trying to survive/return home. Both MLs are royal and initially antagonistic to the FL. The same actor plays the ML in both.

Both are short (short drama vs. short movie), fantasy/historical genres, and have the same actor and actress as the main couple. Both FLs were the MLs first love, and return to him with a different face.