Recommendations

It’s youth drama from high school that the male lead have apart from female lead for many years too and then comeback and end up together again.

Same plot
same costume drama
different nationality for both but the same theme
cross-dressing comedy

Both drama are romantic thrillers.
Both dramas have married lead couple who are hiding secrets.
Both dramas revolve around uncovering the secrets.
But flower of evil, the marriage is well established meanwhile here it's not. Flower of evil is more crime based than this.

Both BL series has basically kinda similar plot: a ghost male lead only visible to a ghost-seeing main character and they connect and fall in love.

FL also worked as a temporary wife for men in need of a temporary, contract marriage. “Love In Contract” was a comedy however. “The Trunk” seems like a dark thriller mystery.

Both dramas have lead couple in a fake contract marriage. Both dramas have a thriller vibe. Both dramas have outstanding powerhouse lead actors.

Both are mini dramas
Both have general FLs
Both FLs were murdered by their P.O.S partner. Husband in WWWMYP, Fiance in Stunning the World.
Both FLs have a nasty green tea b... half sister who has an affair with their husband/fiance
Both FLs come back in time after they are murdered
Both FLs get a nice supportive partner in the new timeline
Both are surprisingly enjoyable considering its low budget.

What's Wrong With My Princess is based on the manhua: Revenge of a Fierce Princess. I think Stunning the World might also be based on a similar manhua but not sure
This one has more action and feels wilder probably because the episodes are so short.

Both are poignant stories of two young men who fall in love but face many challenges and separations due to society and life.

Both are short LGBTQ+ love stories between two high school boys who are ultimately separated by the one's disapproving father, and ultimately reunite years later at the very end.

Both MLs fall in love as high school students but separate due to society's pressure, with one going on to marry, before the two ultimately meet again.

Both shows star the same actress and are about a hardworking woman who’s always helping everyone and has a cheating, ungrateful partner. But in My Wonderful Life, her life gets switched with somebody else’s life, and ends up becoming the heir to a big conglomerate.

Botkawi has forever been in love with Praemai. His life is forever changed when a musical crystal ball he bought as an important gift for Praemai transports him back in time to the age of eighteen. Everything turns upside-down. Instead of fulfilling his hopes and setting things right with Praemai, Botkawi somehow ends up in the arms of Pisaeng. Thus begin their cat-and-mouse games with Pisaeng chasing after Botkawi. Old feelings for Praemai, however, become a detriment to their blossoming romance. Enraged, Botkawi keeps twisting the crystal ball in an attempt to get his desired results.

There's a similar theme of former gangsters attempting to run a legitimate business and leave their life of crime. Both dramas have kind of a found family situation going one.

- Matriarchies (One contemporary (RSL), one historical (LtHT)). In LtHT, it's a women-only town but there are plenty men in the outside world while in RSL the vast majority of men died out.)
- Women trying to win the men's affection
- Female competition (in RSL to win a husband and in LtHT to be able to hunt one, lol)
- Misandry
- Proactive women, passive men
- Secondary couple have the aloof woman / smitten man
- Shady rulers and conspiracy
- LGBTQ+ representation
- Both are Thai dramas from the same year (seriously, what are the odds??)

The tone, setting and plot are quite different tho. RSL is a romcom set in a dystopia while LtHT is basically amazons if they were a cult and less fighting-oriented.

Both are female centric dramas in which the FL is pursing her career and faces set-backs and difficulties along the way. Both dramas have a similar feel.