Hi, can you please suggest some dramas that has been aired already and completed. Any genre is fine. Thank you! :)

Since you like It's Okay That's Love, what about trying Padam Padam or Dear My Friends? They're all written by Noh Hee-kyung.
Korean Dramas ---> 49 days(fantasy/romance),Two weeks(action/thriller/crime), White Christmas(mystery/thriller. These 3 I totally loved them.
There's also You're beautiful(romance/comedy), Heartstrings(romance/comedy), Dong Yi(historical/romance)

Japanese Dramas ---> Buzzer Beat(sports/romance), Hanazakari no kinitachi e(2007)(comedy/romance), Atashinchi no danshi(comady/romance), Shinzanmono(detective/crime), Dragon Zakura(school drama), Nobuta wo produce(comedy/friendship)
Korean: Six Flying Dragons, Empress Ki, God's Gift - 14 Days, Signal, Marriage Contract 
Japanese: Mother, Rich Man Poor Woman, Limit, Kasifu no Mita, Alice no Toge
Dramas I watched and enjoyed that are on your PTW list:
Pinocchio
Reply 1988 
Signal
The Village: Achiara's Secret
White Christmas
You're All Surrounded.

Dramas I watched and enjoyed that aren't on any of your lists:
Faith
Cruel City
City Hunter
Six Flying Dragons
Let's Eat
Thank you guys! I will watch you suggested dramas! :)
Oh also Siren(J-Drama). It's a crime/detective/romance/thriller.
KDRAMA:
Kill Me heal me
Healer
Signal
The greatest love
Secret garden
One more happy ending
Master's sun
I'm sorry I love you

JDRAMA:
Hana Yori Dango
Pride
Nodame Cantabile
Tatta hitotsu no koi
Maou
Liar game
Falling for Innocence