Recommendations

The two main leads both switch bodies and life; having to adjust to being the other person, their lives are going to be mash up to watch.

1. Reincarnation
In "Duay Rang Atitharn" the FL dies and gets reincarnated.
In "Kor Kerd Mai Klai Klai Ter" the ML gets reincarnated.

2. Age Gap
Both the partners of the dead FL and ML in each drama are still alive and much older than 15+ years.

3. Search to find the reason for death
In both dramas, the characters then search to find why they died (KKMKKT) or who killed them (DRA)

1. Two lifetimes for FL
2. There is a 20ish years age gap.
3. The FL reincarnates after her death as a stronger person with magic powers.
4. Both have a mystery to find out who killed her in the past life.
5. Both have ML being faithful to her since her death in her past life.

both couples stay true to each other and always communicate with each other. they help each other solve problems & mysteries. really enjoyed both dramas :)

If you like, smart ML with an assassin girlfriend and a martial genius best friend (fantastic bromance) who falls in love with a spy - all the while solving crimes that lead to the greater mystery of who he is this is the show for you! Comedy, Romance, Martial Arts, Clever and Fun watch Ancient Detective!

Both have representations of powerful women.
Both have a romance while the female lead works for the male lead.
Both feature gay characters with LWF having a super cute couple.
Similarly quirky, realistic characters, similar humor and awkwardness.

Both shows have interesting leads.
The cases have Twists and turns.
Both shows have something to do with the law.
The characters are kinda similar.

Fish Upon The Sky and 2gether are adapted from two novels by the same author (JittiRain). The dynamics between the leads are similar: Sarawat (in 2gether) and Mork (in Fish Upon The Sky) are in love with the protagonist since the very beginning and they spend more than half of the series courting him, while the protagonists are oblivious and initially can't accept their feelings for their love interest. Both series are lighthearted, but Fish Upon The Sky is also characterized by a strong parodic tone.

It has some particular things in similar. At first, we were shown a corpse with the FL stuff they found with the body. This makes us wonder is that the FL or not? It's kinda angst like that. The ML love the FL very much that they ain't scared of anything, while the FL take some more time to be honest with their feelings. The thing is, camellia is bright and fluff and comedic also a murder mystery in modern era while youth of may is more mellow, tragic, and involve real history thats set in 80s.

Both have contract relationship. They marry without love but find love while living together. Both have cold male leads. I loved them both and if you loved either one of them most probably you'll for the other. Both have happy endings and you'll never get bored of them??

HIStory2: Right or Wrong and His both follow LGBTQIA+ love stories, but also touch on family struggles, hardships faced as an LGBTQIA+ family, and relationship struggles. Both main characters of His and HIStory2 fall in love with their partners, but have struggled with their past partners and the family dynamic they previously had. But they learn and grow as people. Although how their current family starts/ family dynamics are different in both stories they end with a happy family and a loving healthy relationship.

dam is as refreshing as kyoko (the manga vr) and Sun Woo is as clueless as kyoko (and ren too) xD the anti cliches in both dramas mix so well, if skip beat had a 2021 adaptation I'd imagine it'd be like My Roommate Is a Gumiho, minus the Gumiho xD

Thai BL dramas. Both take place in university and feature groups of friends from different faculties including engineering. Multiple couples.

Thai BL dramas. Both feature a couple that has been together for 7-10 years and part of their storyline is deciding to get or not married.

Thai BL dramas. One of the couples in Top Secret Together is form by an engineer and a student from other faculty, same as My Engineer. Both feature 4-5 BL couples with different struggles.