Both are mini dramas about an alien who comes to earth and falls in love with a human.
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Both are short and quirky stories of an alien who comes to earth and stays with a human.
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Both are mini dramas with an alien ML who comes to earth and falls in love with the human FL.
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Both are mini dramas with an alien ML who can only stay a brief time on earth and falls in love with a human FL.

Both dramas are about an alien who comes to earth and falls in love with a human. Both are light and quirky dramas.

DCB references and spoofs MLFTS and begins with the FL watching the drama. Both are about the alien ML who comes to earth, falls in love with the human FL, but only has a limited time to stay or he will die.

Both are mini dramas with one of the leads trapped in a day long time loop.
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Both FLs are trapped in a time loop where she and the ML keep dying. In both, she must figure out how to break the loop while growing closer to the ML who she initially doesn't like.

Both are mini dramas in which the FL is stuck in a day long time loop.
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The two seasons are loosely connected with the same FL but different MLs and a completely different plot and tone.

Both portray a world in which vampires live among humans, and a vampire and human end up falling in love.

Both are about vampires living among humans.
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