Recommendations

Both stories feature:
-palace intrigue
-a FL trying to help her sister
-dreams that may/may not see the future
-hidden identities

There's also a tone with both pieces--serious but not so much so there aren't moments of levity and sweet romance. (Although to be fair, the ML in Q:L&W is more romantic than the ML in LJY.)

Two women are raped and killed by samurai soldiers. Soon they reappear as vengeful ghosts who seduce and brutally murder the passing samurai.

Ryunosuke Tsukue in SWORD OF DOOM finds himself doomed to walk the path of demons in a downward spiral into madness and despair, SHURA is as bleak dark and hopeless a jidaigeki as was ever execrated and sealed from man and beast on celluloid. Unlike Ryunosuke Tsukue, however, who starts on the Great Buddha Mountain Pass and slowly cuts his way into his own private hell, Gengobe in SHURA starts in that private hell and plunges himself deeper in depths of the soul unknown. The movie opens with Gengobe hunted in pitch black by hovering lanterns held by unseen persecutors. He enters a house and finds a scene of carnage and mayhem, the floor strewn with mutilated bodies, limbs, others hanging dead from the ceiling. I told you it only starts there.

Comedian Yang Se Hyung's new variety show that also often challenges the hosts to try new things and go new places.

Similar vibes from FL being stuck in a story. Lovely, fun vibes in both, excellent chemistry between the leads in both of them.

Both about the rebuilding of a hospital/clinic alone, with community members, and within an established area that is used to how things already work and are nervous about change/ownership, as well as personal growth for the main characters and hard learning

Similar teamwork between civilian and detective with strong resemblance toward the building of strong relationships, humor, and creative stories!

The women come to their loved ones with an extra 49 days after death.
In this extra time, they spend time to fulfill their wish or to understand the true meaning of life.

They both have a person who comes back to life with 49 days to live.
In 49 days they reappear as a different person. In hi bye, mama they are the same person.

Similar points:
- Park Na-Rae does a good job as a host for both shows. If you enjoy her comedic stints in Park-Jangs LOL, do check I Live Alone out for even more of them.
- Both shows are about real life and real people.

They are supposed to be in the same fictional universe

1. Similar to 365 repeat the year, 100 million... has then there were none type of element. One by one mysteriously dies among a group of people.

2. 100 million yen women has 3 digit number in its title, much alike 365....

In both shows:
-You get a lot of action and fun fight scenes.
-The leads fight against corruption.
-One of the leads is reckless and the other is more mature.
-There's romance weaved into the story unobstrusively.
-FL gets betrayed by someone she trusts, but who is also in a position of power.
-Story's plot is old-school in nature.
-The antagonists act a bit like caricatures.
-Teamwork is crucial.

Both shows:
-Involve a character being an NIS agent.
-Have a lot of great action scenes.
-Showcase a female agent working undercover.
-Has a subplot of romance on the side and something of a love triangle.
-ML has a bit of bromance with a support character.

Season 3 is the continuation of season 2, I just thought I should put it as a recommendation so that anyone can easily find it.