Yes, I have seen the drama, "The First Shop of Coffee Prince" or 커피프린스 1호점. Out of the select number of dramas I have seen, I did enjoy this one. Mostly because it was fun to watch the character get all muddled over starting to like a boy, who was really a girl. Need help knowing what this drama is about, go here.
When dramas finish their run of episodes they leave behind the places they shot at or built along the way. There are whole "villages" around Korea where you can go and see famous drama filming sites and sets. So it is with the cafe that was created and left behind in the Coffee Prince drama.
In Hongdae you can still come by and see the shop, even go inside and enjoy a cup of coffee. Tourists flock to this site to see in person their beloved drama. In fact, as I approached the cafe two Japanese tourists were in front of me.
Today the place looks like and old cafe, with the greenery getting the best of the structure. Things could use a cleaning here and there, but perhaps that's not necessary.
How to get to:
It's along the way to the Design Museum, which I talked about in my previous post. I would recommend swinging by and admiring the cafe, along with all the drama fans inside.