So I looked through my completed list and idk, some I don't remember very clearly but all of there dramas have cold male leads to one degree or another:
Just You (2013) - I remember the main couple having good chemistry in this one.
With the following 3 I had a lot of problems with but maybe you'll like them more cause I'm super picky
My Lovely Sam Soon (2005)
She Was Pretty (2015)
ToGetHer (2009)
You're Beautiful (2009) (If you've somehow haven't seen this already)
Attention, Love! (2017) Now this drama is kind of that but then not really. The main male lead is super nice to the female lead but is very cold towards everyone else so idk but it's a good drama nonetheless.
My Mr. Mermaid (2017) The main couple consists of unusually nice people but the side couple consists of a very arrogant guy who fell in love with a tomboy and it's the cutest thing ever.