AH:
(edit: I added a few more examples of my favourite moments)
I see your edits and wanted to add some similar gifs to my recommendations since I don't have much to do right now xD
Last Cinderella: this moment, this one, this one, hehehhehe, more
King2Hearts: this video is basically a compilation of their cute moments since its hard to find gifs for this one https://www.youtube.com/watch?v=C0qRDcm2oEE
Lucky Romance: lol this one , this one lol proud cause he's her bf, cute, being sneaky
Marriage, Not Dating: hehe , cute , here , here they cuddle a lot but it was hard to find gifs
MARS: almost impossible to find but 'cause it's an old drama but here here here
Shopping King Louie: they are just too precious for this world here , here
The Girl Who See Scents: here , here this is a very comfortable realistic relationship drama, subtly asking for a kiss