Both are about the relationship between a cat/human and a human.
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Both are about the relationship between a cat/human and a human.
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Both are about a cat/human shapeshifter who ends up living with a human who was kind to them when they first met.

Both are short (short length drama vs. short film) and are about the relationship between a cat/human and a human.

Both are about a cat who turns into a human and begins living with a human who was kind to them.
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Both are short (short length drama vs. short film) and are about the relationship between a cat/human shapeshifter and the human who was kind to them.

Both are historical dramas about the relationship between a cat/human shapeshifter and a human. Toward the end, the cats save the human's lives.

Both are LGBTQ+ love stories with an innocent and sweet cat/human shapeshifter and a lonely human.
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Both are short length dramas in which one of the leads travels through a portal/door to the past and tries to stop the other's death/disappearance back then. Both present time travel more like parallel worlds/timelines, and both have slightly ambiguous but happy endings.

Both FLs are from the modern day/future, and travel to a historical fictional world where they meet and become involved with the villain/antagonist ML.

Both have a FL from the real modern world who enters a story, and ends up becoming involved with the plot's antagonist.

Both are short length series in which a real world FL enters a fictional historical world (story vs. drama). Her efforts to return home change the plot as well as cause her to become involved with the plot's antagonist who is the ML.