Good ones like Bridal Mask, Liar Game, Two Weeks, Cruel City, Signal, and Innocent Man, it can be romance melodrama, thriller, action, historical, mystery, suspense, dramas like that stuff, does anyone know any must watch non-comedy serious dramas? I want to take a break from comedy 

Tunnel, The Devil, Story of a man
Tunnel
Healer
Jewel in the Palace
Moon Lovers: Scarlet Heart Ryeo
Iris
Empress Ki
My Heart Twinkle Twinkle
(This drama is seriously underrated. At first I was scared due to the ratings, however, if you're into melodramas and makjangs, then this drama is highly entertaining and definitely worth watching!) 
Missing You
Remember – War of the Son 
Hwang Jin Yi
Defendat and Remember -War of the Sons.
Just watch Chicago Typewriter. You won't regret it.
Yes, Chicago Typewriter is a must watch drama.. it's actually my favorite kdrama for this year so far,
but she said she wants some "non-comedy serious dramas" :(
Circle, its TOO much ♥ Duel too ;D
Chicago Typewriter, Secret Love Affair = Yoo Ah In kdramas. seriously, you wont regret it