Recommendations

Ruk Lork Lork Yah Bork Krai is similar to Ruk Nid Nid Kid Tow Rai because of the fake boyfriend/girldfriend them to avoid the main actor/actress to be forced to marriage by their parents. Both are comedies.

Fai Tang See is similar to Prik Kee Noo Kub Moo Ham because Mew is the main actress who plays a young lady living abroad and meets a "poor" young man and will become her boyfriend.

Both are an exploration of more mature relationship, but Old Fashion Cupcake is a deeper and more subtle production.

"Moon Embracing the Sun" is a Korean drama that has the same fire and chemistry of "Love Like the Galaxy". It shows how two people are loyal to their hearts. Both FL and ML are extremely smart and kind people at the core and remain unchanged throughout the drama.

Similarities:
-Both have very smart leads and support that help each other no matter what. They treat each other as equals.
-Both are Republican era murder/mystery solving dramas.
-Both have comedic elements and banter amongst the entire cast.
-Romance is present.
-Each case is concluded successfully and through much understanding of evidence.

If you are an animal lover, a cat theme might be right up your alley too. Both dramas involve the ML having pet characteristics and a female lead who loves them dearly.

Both are about a captured merman and the relationship that develops between him and his captor. Both relationships are a mix of love and hate.

Both evolve around the relationship between an older and a younger man in the area of justice (one series is judges and the other is attorneys). both work in a flawed system where it takes cleverness (and more?) to outwit criminals. The older is skilled in his field with a personality difficult to read with questionable methods. The younger is slightly naive (through also clever) but with a good heart. The interaction of the two changes/challenges them. Both series covers characters with pasts/histories/motivations that become revealed as you watch the series. Both are very compelling with great acting/presence from the two older leads. Also a smattering of some great strong women throughout.

This is a movie which is similar to Big Mouth with the concept of the main lead falsely getting accused of crimes he didn't commit. Both main leads manage to survive in prison by fighting back and although we don't know how Big Mouth will end as of this moment Fabricated City brings justice to those wronged and punishes the antagonist. Definitely recommend and since it's a movie it's not too long, the fight scenes in the movie are also top tier.

There is action and violence in both these kdramas and an evil figurehead which people try to work out throughout the show.

Bad Romeo is similar to Game Rai Game Rak as the drama is set in to separate steps :
-the past when both main actors were young adults, had a romance and got married
-the trouble event that separate "Romeo from Juliette" (the main actress family put a plan to create a misunderstanding event that causes the separation)
-the main leads are meeting one another again a couple of years later ( in Game Rai Game Ruk, Saichon becomes Charles and in Bad Romeo, Kla becomes Karls)
-the main actors upgraded his social status and try to revenge on the main actress whom he thinks has betrayed/sent his to death intentionnaly and forgot him

" Time travel " is a part of the girl who leaped through time franchise. not exactly similar but the entire going back and forth via time and space thingy is there. not only in this "toki wo" movie in others as well.

in KTEM ML goes to portal into parallel dimension of the same time era . FL goes back in time cause of a rock. but in both dramas the leads can go back and forth into their dimension/time. which is rare in dramas with time travel. mostly it shows one of the leads to be stuck in one time and never able to come back and how they settle there, many of the times in someone else's body. thats why i though this might be a good suggestion

The main subject of both dramas is the same. An Unicorn is a term that a privately held STARTUP company. Maybe that stories of both kdramas are not similar the subject is the same people who creates little business and they want to achieve a dream. They main goal is to success with their companies. (Psdt: I’m going to improve my comment)

- Both of these are the adaptations of the original British show "Doctor Foster".
- Affair, rich people and etc