VISA in KOREA 장행닷컴행정사 location is 15 meters from Exit 1, Seocho-station, Line#2.
When you come out Exit 1 of Seocho-station, see 태일 부동산 (Tae-Il Real Estate sign) on Wolheon building. You may take an elevator and get off at 5th floor. Come to Room no. 515.