Recommendations

Both about a lady assassin! Azumi is trained since an orphaned young child to be a master ninja but something goes wrong on het 1st mission and her whole team is killed!

Azuni is orphaned as a child but taken in by the master who traines her and othet children to be ninja assassins!

Both about a female assassin based on a manga! And both are orphans!
But Azumi is trained to be a ninja as a child!

Also Samurai vs. Ninjas!
Azumi is trained to be a ninja since a young child. Het 1st mission goes badly losing all her team except one so seeks revenge!

Ninjas vs samurai! Azumi is trained to be a ninja since she was a littke girl!
' Nuff said as Stan Lee would put it!

Azumi was also trained to be a ninja as a child! More than half the children died during training just like DemonSpies!

Palace politics; multiple couples and people falling in love or marrying the wrong people first and then finally the right people. Much jealousy but also a strong sense of loyalty towards loved ones.

You must first watch the first season of WEAVING TALE OF LOVE before watching the second season so you can understand the story more.

Unnerving, erotic, themes of something growing that's unable to be stopped, black and white old Japanese cinema, amazingly matching soundtrack. Be warned that Tetsuo: The Iron Man has body horror

The other half of me and you is set in a world where all the gender roles are reversed (however, the women still are the ones getting pregnant)

Female lead is more powerful than male lead
But this is a modern drama not historical.
Married couple love triangles. Family issues.

Married couple hardworking, going through tough situations together.
Historical fiction and very interesting.

Both plots contain finding the missing daughter, but they are different.
Family; parents, siblings relationships
Something that almost became a brother-sister relationship
Female lead going through hardships, and male lead helping her up
Heartwarming characters

Both Bite Sisters and Hotel del Luna have immortal female lead and both have fashion sense but in Bite Sisters the female lead is immortal because she is a vampire. Besides, it has both interracial relationship between immortal and a human

That same "two lonely people find comfort in each other vibe",
but in this movie the affair is brought as the main plot.
Also includes queen of cannes, Jeon Do Yeon.