Hun Shi (2023)

Both are mini dramas with a dark tone in which the FL discovers the man she loves is keeping many secrets from her and everything she believes may be a lie.

Same mysterious and manipulative husband. Relationship seems perfect but the wife soon begins to suspect the husband of keeping a dark secret. Both also have loving husbands to the wife, but Dear Liar's husband is also pretty mean to her while FOE's husband is only nice to his wife and nobody else really.

In both dramas the couple is already married from the beginning of the drama and they used to love each other , but the male lead is a questionable character with many hidden secrets.
Both dramas are romance/thrillers with suspense
In both dramas it is implied that the male lead (husband) keeps the female lead (his wife) locked in the house (with the excuse of protecting her due to her health issues).
Those 2 dramas are very similar. In both dramas the male lead loves his wife deep inside, but he has a possessive attitude and is obsessed with control. Those are signs of abuse and therefore it's wrong to exist in a relationship.

Both are short length dramas in which the FL ,discovers a web of lies around not only her husband but everyone around her, and must form a plan of revenge and escape for herself.