Recommendations

Both korean dramas involve a love story between a human woman and a Gumiho. They're both quite sweet but intriguing dramas having a blend on fantasy and romance.

Its the First season where they formed ninepercent with kun Pd, its the same type of survival show and in my opinion i perfered idol producers.

Thai BL with multiple couples. One of the side couples is very similar, Leo/Fiat and Mek/Boss. In both one of the leads has a crush on the other since the beginning but he stays in the friendzone. Still, he tries to help his crush with his lovelife even if it hurts.

Both dramas are centered around martial arts and have elements of mystery and action as well as some romance. Also, they both have male leads that appear at times to be weaker than the females. If you like martial arts and mystery dramas, but are looking for something a bit shorter than Legend of Fei, Ancient Detective is a good option, because it's interesting, of a similar production quality to Legend of Fei, and could serve as a good in-between show to watch while waiting for the rest of Legend of Fei to premiere.

Both shows center around a young girl's effort to fulfil a dream that was inspired by a strict but supportive older man at the top of his field. The male lead falls for her charming determination. Their stories are supported by well-rounded secondary characters and endearing side stories.

KoiTsudu / Love Lasts Forever is set in the world of nurses (and doctors), while Kono Koi Atatamemasuka / Warmed-Up Love is set in the business of convenience store sweets.

they both had that "Bear Hug" theme, ie a foreign company tries to acquire multiple companies after ruining their stock business talk stuff

- Similar genre: Romance, Action, Mystery (Plot Twists)
- Hero-like ML protecting naïve FL
- Plot revolves around characters with secrets and crimes

Similarities:
Both have MLs have Pposopagnosia and can only recognise the FL.
Both have a bossy guy- minion girl dynamic.
Both have MLs who are the best at what they do.
Both have MLs who are rich and FLs who are from a poor background and have to take care of their younger siblings.
Both have MLs taking the help of FLs to help interact with other people.
Both have FLs pretending to be someone they're not.
Both have MLs who have poor relationship with their mothers.

Differences
One is a college romance, other is an office romance.
One is a KDrama, other is a CDrama.
The FL pretends to be a boy in 'the unicorn girl' whereas in the other one, FL pretends to be rich.

A beautiful guy enters the lives of women and changes it. While Mother and Daughters is a more light and heart-felt portrayal, Junichi is a more mature version of that.

- both have strong female leads
- both female leads have to pay hundreds of years for their sins
- both have supernatural elements
- both include the stories of people who died / have grudges
- both have flashbacks of memories in historical korea

Both have twists and turns to keep you second guessing everything. Both are written cleverly. Trust is an issue, rightfully so.

It's about a teacher, that was actualy a lawyer, who want to find and reveal the truth about the dead of a girl.

Although the characters’ personalities are quite different, the shows both give off the same feeling! They have the same genres and also a very good amount of skinship. The protagonists are in arranged marriages but quickly fall in love and start being a real couple pretty early on in both dramas. The male leads both start off not trusting the female leads, and end up falling for them so hard that they can’t live without them. Also, if you are someone who hates unfaithful husbands in dramas, you can rest assured that both the male leads only have eyes for their lady :)

Have the same "outcast" police division premise, ST is more about science while Keiji 7-nin is more of a field work.

Both are coproductions between the USA and Taiwan with an interracial couple and a focus on chinese culture. Also the mom in both is played by the same actress.
The films are very different in tone and quality though.