What was your first Korean webtoon??

My first webtoon if I remember correctly was '19 days'.
I was not aware that this was a webtoon and treated it just like a manga.
I was confused at first because i was reading it from right to left.
Also I didn't know a page was usually that long, so I usually missed out some of the panel.
I was an idiot back then.

Now I'm completely obsessed with Korean webtoon.
My favorites are Lookism, Blood Bank, What lies in the end and Killing Stalking.