Looking for a korean drama with a lot of time together as a couple

hI I am looking for a drama with happy ending and that the couples are together for a long time , I hate when they are only together a few episodes. I have watched:

Cinderella and 4 knights

DOTS

w

marriage not dating

lie to me

you are beautiful

healer

city hunter

Full House Thai
It's Okay, That's Love
Love in the Moonlight
Love O2O
From Five to Nine

http://mydramalist.com/2278-to-the-beautiful-you
http://mydramalist.com/16973-love-in-the-moonlight
http://mydramalist.com/1445-heartstrings
http://mydramalist.com/16192-doctors

Kill me heal me
the greatest love