Choma (초마), located in Hongdae, is a popular Jjambbong (spicy Korean-Chinese noodle) restaurant.
It's known to have long lines for waiting, but it's definitely worth while.
Choma's rule is to make the food right after you order, instead of making the food ready beforehand. So you can taste a very fresh and yet delicious jjambbong.
In 2015, it was introduced as one of the best Jjambbong restaurants in Seoul from Korean TV Program "Wednesday Food Talk (수요미식회)".