Recommendations

It's the side story from The Lost Tomb like Reunion. The timeline is 2 years before reunion. It's more focus on the nine families and ofc, we still can see Wu Xie.

These 2 chinese rom-com has fake marriages between tough and martial arts trained princes ML and funny, smart witty FL.

These shows are kinda similar because in the happiest moments of their life they thought that was going to be their "happy ever after" but as years go by they get divorced. And then unexpectedly go to their youth.

The show invited seven girl group members to create their very own Korean drama series by becoming accredited scriptwriters as well as acting in the series as fictional versions of themselves. And able to perform on music shows as well.

same concept, added a few new cast like GOT7 JACKSON, KARA YOUNGJI.
this show is to make new relationship with others celebrities of making new friends, getting know each other.

Older male lead becomes young
Tries to develop a relationship with his son (and his daughter in 18 Again)
The difference is that the romance is between his wife in 18 Again whilst Mr Back is with an employee at his company

They both have college romance and very less negative roles. If you liked accidentally in love then you will like Love O2O for sure.

Both female leads undergo plastic surgery and a major appearance change. Diamond lover is more workplace/adult drama. As where Gangnam beauty is more college drama relating to image and status.

It's the prequel to part 2. Both are short and hilarious, I recommend watching part 1 if you want to understand the flashbacks but you would still understand the drama if don't want to. They got a lot of same actors from the first season which is always a plus.

both deal with ghost, however this is about a detective and a woman who does anything in her power to not see any ghosts

The similitudes in these shows is that they revolve around cheating.
Otherwise, while Plerng Boon has much more production value (quality of the show, acting, screenplay...) as a Ch3 product and the story is more "complex" Talay Prae is of a lesser quality overall.

Another difference is that the motivation of of the cheating partner and their characterization are world apart.

The male lead (28 years old) goes back to his younger body (18 years old) out of nowhere to find why the girl he liked commited suicide.
SIMILARITIES: Age, Younger Body

Both Female leads have this sixth sense that helps them solve crimes. However, it's more prominent in "Girl who sees smells".
Both plots involve a lot of drama as the gang solves cases including solving their parents case.

This one is also a game type! IT WILL BE LIKED BY YOU ALL AND CAN GIVE IT A TRY AND IT ALSO HAS ONLY 10EPISODES/////

AND IT'S DURATION IS ALSO VERY SHORT
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

This is probably the only drama that I can think of that has similar vibes. They aren't very similar..but Secret is probably one of the best "enemies to lovers/ revenge love" dramas that I have ever watched.