Looking for a good period drama in: mystery/investigation genre or romantic comedy genre!

Hi guys!

I'm looking for recommendations for a good period drama! It can be Korean, Taiwanese, Chinese, Japanese, whatever! I really like mystery/investigation dramas, and romantic comedy type dramas. Do you guys know some good dramas in either of these two genres? For instance something like Detective L, My roommate is a detective, Reply 1997, Reply 1988, Life on Mars, Love in the Moonlight, 100 days my prince, Mr. Queen.

Thanks in advance

Ashi Girl (jdrama, romcom)
The Tale of Nokdu (kdrama, romcom)
Love Like White Jade (cdrama, romcom, multiple couples)

Since you liked Life on Mars, i recommend you Signal 

Fall  in Love (romance+thriller)

General's lady (kinda romcom)