emeraldarrows

Both are BLs that take place in a world where there are people who supernaturally lose/lack senses (hearing vs. multiple senses) and are connected to a soulmate who is the only one who restores their senses/whose voice can be heard.

Both are mini dramas in which the FL is forever stuck in a side role (villain vs. SFL who always loses the guy) until the latest story where she has a chance to change the plot.

Both are historical dramas by the same director with the same actress as the FL. Both FLs begin the drama by suddenly exchanging identities with someone else, leading to them entering that person's household. Both MLs have one or two loyal men/guards who follow him. There are two other men (one of whom is or turns evil) in love with the FL over the course of the story, but she never has any interest in anyone but the ML. Both plots revolve around one of the lead's quest to avenge their murdered father.

Both are Republican Era mini dramas in which the reporter FL and detective ML are working together to solve murders and mysteries around the city.

Both dramas are about the relationship between a human and a merfolk and involve a shady character/originations attempting to capture and experiment on mermaids. Both FLs work at an oceanic institute.

Both dramas are about the relationship between a human and a merfolk, and involve a sinister person/group trying to capture/experiment on mermaids.

Both dramas are about the relationship between a human and a merfolk who are both seeking answers in a mystery surrounding a crime that happened to the human's family member.

Both dramas are about a romance between a water being and a human in an urban setting.
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While very different in tone and setting, both feature main characters who are mermaids and both are very visually pretty dramas.

Both are about identical twin sisters who were separated in infancy and raised by different families. As adults, with very different personalities and lives, the FLs take the place of their identical twin sister, leading to them falling in love with the MLs.

Both FLs take the place of their identical twin sister, leading to them living with the ML. The two then fall in love.

Both FLs take the place of their identical twin sister, leading to them living with the ML. The two then fall in love.