emeraldarrows

Both are mini dramas with a contract marriage between the main couple.
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Both are contract marriages intended to only last a short time that turn into genuine love. One is historical, the other modern day, though.

Both are contract marriages between the FL and the ML.
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Both are contract marriages between the FL and a rich ML.
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Both dramas have a contract relationship (siblings vs. marriage) between the main couple in order to please the ML's sick grandparent.

Both are dramas about a contract marriage that becomes true love. Both MLs have an ill grandmother.
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In both, the MLs are doctors and the FLs meet them when the pair save a person who collapsed on the street, inspiring the FL to follow him by becoming a nurse. The two then meet at the hospital on the FL's first day but the ML is different than she remembers.

Both have a nostalgic, bittersweet feel of past school days and the unlikely friendship between a group of kids to adults.

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While one is historical and the other not, both are mini dramas about a group of strangers trapped in a place where they must solve a mystery and stay alive to escape.

Both appear to be set in the same time period and are historical dramas with palace intrigue and a star-crossed romance between a royal lead and a non-royal lead who works for the palace. The royal lead had a non-typical upbringing (either raised as a commoner or isolated from the palace). Both dramas have a subplot in which a foreign priest arrives and is hidden by the main characters.

Both dramas are about a water god in love with a mortal woman who has an odd destiny/fate with them.