Mr. Queen (2020)

Here we have the same gender-bender genre from the folks that brought you Go Princess Go. Some of its actors appear in this as well, namely male lead Peter Sheng as the devil-may-care man-about -town prince dandy betrothed to a decorated army general with a big secret- she’s a woman.

In both dramas main character works as chef in present times and a mishap causes them to travel back in time and to survive during this unsettled times they uses their knowledge on fine cuisine

Bamboo Forest is the spin-off/ prequel short series of Mr. Queen, which reveals the untold secrets in the original series.

guy from modern time switches body to person from past. In mr Queen modern guy wakes up as queen in Joseon era. One actor (in Mr Queen actress) portrays two characters-so well done, you think they are really 2 different individuals.
Mr Queen is very funny, very original and different from 100 times seen dramas and Actress does phenomenal job.

Both FLs are a modern day man who fall into the water and find themselves in a woman's body in historical times.