Dokkebi is a South Korean restaurant on Raymond Losserand Street, a vibrant and dynamic Parisian street with several restaurants/food shops. They are very friendly, they do takeaways or you can sit as there are few tables and it's generally not full. While waiting you are served tea and they start to chat with you, I liked this. Korean food is pretty good, if you like Chinese and Japanese, because it's different, although there are similar dishes. I tried a few skewers of meat with a bittersweet sauce and various fried foods. Takeaway is less than 10 euros/person, slightly more if you eat inside.
Sik Gaek is a small Korean restaurant on Lamartine Street down the hill of Montmartre. It's good if you fancy trying different cuisine, there are Thai and Japanese hints and ingredients, but also a different flavor. The decor is minimalist, modern and photos on the door help you to choose dishes. The Korean pancake with soy is very rich, there are wok noodles with meat and vegetables, a seafood crepe for 11 euros, 15 euros for breaded shrimp, beef skewers with homemade sauce and a seafood pot for 2 people for 30 euros. The menu is 17-19 euros with a good selection of dishes and there's a 3-course à la carte for about 30 euros. The desserts didn't seem very special (5-6 euros).