9 end 2 outs
cruel city
@Sia

Byakuyako (very good dark drama)
@fanitha

boku no yabai tsuma, for sure. there's great suspense throughout the whole drama. the first eps are a lot like gone girl, but it is its own story after that.
koe koi, if you're in the mood for a very cute & chill high school romance.
& also nigeru wa haji da ga yaku ni tatsu for a light romance + hoshino gen is just perfect in his role.
@SarahEm

Reply series
Mars: Tada, Kimi wo Aishiteru
@IzzyDramaLover

For movies: 
Codename: Jackal and Penny Pinchers!
(both are very fun and enjoyable movies, with great cast!)

For dramas:
Splash Splash LOVE
(One of my all time favorites! Only a few episodes, but the plot and the acting is just amazing! Funny and super cute!)
School 2013 (Lee Jong Suk + Kim Woo Bin = friendship goals aka GREAT bromance! Original and inspiring characters.)
I Hear Your Voice (Very interesting, original and AWESOME plot! Super cute noona romance, plus, one of the best villains of kdramas!)
A Girl & Three Sweethearts (Kinda cliche and simple, but it just put you in a good mood, lol. Very sweet and light drama, worth watching!)
Mirror of the Witch
Gokusen
1 Litre of Tears
Signal
Reply 1997
I'd recommend Romantic Doctor Teacher Kim, Sassy Go Go and Angry Mom :)
These titles are some of my really must-watch:

Crazy Little Thing Called Love
Death Note
Densha Otoko
Hirugao
Kazoku Game