Try:

  • Reply 1997 (Korea) 
  • Good Morning Call (Japan)
  • Autumn Concerto (Taiwan)
  • Neung Nai Suang (Thailand)
  • Love O2O (China)
  • Accidentally in Love
  • Ashes of Love
  • Battle of Changsha
  • Boss and Me
  • Eternal Love
  • Moon Lovers
  • Princess Agents
  • Siege in Fog
  • The Journey of Flower

A lot of these are historicals which I don't know if you're into but they all have some really great cold/cold that turns sweet male leads ^0^

I recommend:

Boys over Flowers

Scarlet Heart Ryeo 

Cheese In the Trap 

You're Beautiful 

Goong

What's Wrong With Secretary Kim 

A Korean Odyssey 

A recent one : Touch Your Heart 

Hua Jai Sila (Thai)

Drinking Solo (Korea)

Heartstrings (korea)

Marriage Not Dating (Korea)

My Girl (Korea)

My Secret Romance (Korea)

Stars Falling from the Sky (Korea)

Cheese in the Trap - This ML is so cold that he's essentially sociopathic, although he hides that aspect of himself from most people pretty well. The FL sees through it, which catches his interest.

Eternal Love - The ML is pretty stoic.

Liar Game - The ML is cold/stoic most of the time, but there's not much in the way of romance. It is hinted at, at most.

My Girl - The ML is introverted and can often seem cold, but he's actually gentle and warm-hearted.

My ID is Gangnam Beauty - The ML is introverted no matter who he's with, and fairly cold unless he is interacting with his friends or love interest. He can even be kind of cold with his best friend.

Princess Agents - Both MLs are cold in their own way; Yu Wen Yue has a cold personality but he is actually a kind person who is sometimes conflicted by his responsibility to his family/household. Yan Xun is initially a outgoing, sunny character who experiences an extremely traumatic event and changes dramatically as a result.

Suspicious Partner - The ML is introverted and can be a bit cold/crabby.

The Last Empress - Wang Shik has a stoic disposition and only becomes a bit warmer around the FL. Lee Hyuk can be cold, but he's also childish/goofy and funny in many scenes later on.

Touch Your Heart - Lee Dong Wook's character is pretty similar to his character in Hotel King (and My Girl).

You Who Came From the Stars - I didn't love this one, but many drama watchers are fond of it, and the ML is very stoic/cold most of the time.

Loving, never forgetting 

Sealed with a kiss

Kleun cheewit

Padiwaradda 

Wanida

Secret 

Bring it on ghost

Because this is my first life

Another miss oh

My girlfriend is a gumiho 

Faith

Panthakan Rak

The  fox’s Summer

Sud Sai pan

  • Hana yori dango
  • Scarlet heart
  • High end love
  • Noble my love
  • Well intended love
  • Summer's Desire
  • Hello Monster
  • Secret Garden
  • Hwayugi
  • 100 days my prince
  • Good Morning call
  • Itazura na kiss