Hi!!! :D It's very nice to meet you!!
49 days - romance/fantasy - 20 eps
Two Weeks - action/drama/thriller - 16 eps
White Christmas - mystery/drama/school/psychological/thriller - 8 eps
Oh and watch the Korean drama special called Live Shock if you can!! It's in You-tube.
I saw that you've watched only K-dramas, but I'll recommend yo a few J-dramas to watch...watch if you can, they are really good :)
Asuko March! - friendship/romance/school - 9 eps
Beautiful Life - romance/melodrama - 11 eps
Buzzer Beat - romance/sports - 11 eps
Good Luck! - life/romance - 10 eps
Koishite Akuma - romance/school/vampire - 10 eps
Siren - romance/crime/thriller - 9 eps
Hanazakari no kimitachi e - comedy/frinedship/romance/school - 12 eps + special ep
Limit - life/school/psychological/suspense - 12 eps (1 ep is 30 mins each)
Nobuta wo Produce - comedy/friendship/school - 10 eps
Ryusei no Kizuna - comedy/family/mystery - 10 eps
Shinzanmono - crime/mystery - 10 eps
If you wanna know any website from where you can watch dramas, ask me :) I hope you enjoy the recommendations!!