This franchise coffee shop that appeared quite often in the Descendants of the Sun was the filming location for W Ep 13 too.
This is the place where Kang Chul and Yeon Chul had a date and then met Professor Park unexpectedly.
這是Dal.Komm光化門分店。地址: 首爾鍾路區新門內路92號光化門Officia Building一樓
This is Dal.Komm Gwanghwamun branch. Address: 1/F, 92, Officia Building Saemunan-ro, Chungro-gu, Seoul
Location: Gwanghwamun Station (Seoul Metro) Exit 5 or 7