Recommendations

Raise de wa Chanto Shimasu is a Jdrama that talks about the secret sexual life off a “normal” girl.
They explore the sexual life off the characters and try to tell the story with a more natural vision about this “forbidden” wolrd. Is a more mature drama and really enjoyable to learn a little.

Both are mini dramas in which the ML has a dark personality/on a dark path and the FL enters his life under a false identity/pretenses.

Both are about a poor FL entering the house of a rich grandfather and his grandson(s) and becoming involved with one of the grandsons.

Both are mini dramas in which the rich ML is in a contract relationship with the FL to pretend to be someone else (his long lost sister vs. lost fiancée) in order to make his sick grandfather happy.

extremely similar female leads both in appearence,personality,and goals.Deeply damaged bullied people who went through a hell of an adolscence only living for revenge afterwards.A dark and thrilling atmosphere surrounds both of these dramas,lots of gore,violent scenes,and death.

I initially watched Young Lady and Gentleman bc I thought it would have the same vibes. All I can say is they're somewhat similar, and in my opinion, the only difference is that 12 Years is a lot shorter and with a lot less soap-opera drama.

Queendom is the same variety show but with girl groups. Here is the second saison of the female version.

The female lead in Vengeance of the Bride is also in Young Lady and Gentleman. If you like her acting in either one, I suggest watching the other.

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

Office Setting with an ensemble cast
Smart Female Lead who excels at her job
Office Romance that's a slow burn

Both dramas have the odd concept of the main couple pretending to be brother and sister and living together.

Both are mini dramas in which the ML and FL agree to a contract relationship as relatives (brother and sister vs. father and daughter) for the ML's need to please a relative, and while living together they fall in love.

Both dramas are fake brother-sister relationships between the main couple. And both MLs fall first.
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FL has a contract relationship with the ML (pretending to be his sister vs. being his wife for a short while) which is to benefit the ML's father in some way. Both are mini dramas.

In both dramas the main couple have a fake brother-sister contract relationship that turns to romance.