I'm looking for recommendations for some nice romance Korean webcomic recommendations. I would prefer something targetted towards females (more of josei than shoujo) and preferably short and complete!

Some that I have read and liked:
The lady and the butler
Shall we have dinner tonight
The man who cleans up makeup
Can't see can't hear but love
One of a kind romance
Cherry boy that girl
Story of someone we know

Hobbies include impersonating fictional characters and sucking on ketchup packets.

The first that came to mind was Our Relationship Is.... It is rather dramatic (typical of many Korean webcomics), but the main pairing's interactions more than made up for that.

Super Secret A bit long in terms of chapters, however the length of each chapter is relatively short. It is unbelievably sweet, though the art style might take some getting used to as it is entirely chibi-like.

Unlike the above recommendations, I have not personally read the manga listed below myself, however I hope they still satisfy your request.

Nineteen, Twenty-One
Orange Marmalade
Forever Mine
Dangsinman Molla! (incomplete)

Family Man - It's more about family, but the husband and wife love each other very much. You especially get to see their love towards the end.

Forever Mine

Que Sera, Sera

Perfect Honeymoon