As here where I live, it's often freezing in wintertime, so I'd like some long (lots of episodes), but not boring or draggy ones. It's 6 months and often times, cupped up inside. I'm open to : time traveling, love-hate, reverse harem, historical (period dramas), court intrigues, business world, crime-solving.  Preferrably some of the latest ones too. I'll need lots of recommendations to fill up my time in the cold harsh Northern Canadian winter. I strictly consume Asian movies and TV shows online.

Empress Ki - historical, love-hate, court politics, melodrama

Jewel in the Palace - historical, court politics, melodrama

Nirvana in Fire - historical, court politics, martial arts

Rooftop Prince - historical, mystery, time-travel, romance, comedy

Healer - action, political, romance, mystery, comedy

Tunnel - time-travel, detective, crime, thriller, mystery, psychological, suspense

Hello Monster - crime, thriller, mystery, detective, psychological, romance, bromance

While You Were Sleeping (airing) - law, crime, romance, supernatural

Cambrian Period - crime, politics, action, romance, comedy

Hi, 

Not sure what you have seen already,bit here are some things I would recommend..

Korean- 

Stranger

Signal

Voice

Save Me

Bad Guys

Cruel City

Pied Piper

God's Quiz

I Hear Your Voice

History of the Salaryman

Vampire Prosecutor

Naked Fireman

Nine: Nine times time travel

Queen In Hyun's Man

Currently airing: While you were sleeping, Witch's Court

Chinese- 

I second Nirvana in Fire

Love Me If You Dare

The Mystic Nine

Japanese-

N no Tame ni 

Ouroboros

Keizoku 2: Spec

Siren

Bitter Blood