Koi Ramen Jeongja Main Branch is a ramen shop in Jeongja-dong, Bundang-gu, Seongnam, serving Japanese-style ramen and chashu rice bowls. The original ramen comes with chashu and a soft-boiled egg, and garlic is added to change the broth's flavor. Customers pay first at a kiosk in front of the shop, then wait for their number to be called before entering; on a Sunday at 2 p.m., the wait was about 20 minutes. All indoor seating is at a bar, which makes it uncomfortable for groups to sit together.