Just Fiancée (2022)

Both mini dramas have a contract relationship between a rich CEO and the FL.
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Both are mini dramas in which identical twin sisters trade places, leading to one falling in love with and/or marrying her sister's fiancée.

Both are mini dramas with a contract relationship between the main couple.
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Both are mini dramas about a contract marriage that becomes true love. Both MLs marry in order to appease their parent or grandparent.