If 틈새라면 looks familiar, it could be because their ramen is sold in convenience stores and packaged as single serving ramen bowls in addition to their physical restaurant. In Myeongdong, 틈새라면 serves two things--빨계떡, a spicy ramen, and the non-spices version called 계떡.
So try something new. Try something hot. Try to make it through an entire bowl of the spiciest ramen you may ever eat. Good luck. You're gonna need it.
Addresss: 4-1 Myeongdong 2(i)-ga, Jung-gu, Seoul, South Korea