This is Gang-soo’s (Go Kyung-pyo) mother shop in Strongest Deliveryman (최강 배달꾼) (KBS2, 2017). He comes here in episode 11 to visit a good friend (which he later finds out is his half-brother) and finally stands in front of his long-lost mother that he was searching for all these years.
Jeungsan Stationery [증산문구] is a Office supplies and stationary shop located in Jeungsan-dong [증산동], Seoul.
Adress: 62 Jeungsanseo-gil, Eunpyeong-gu, Seoul, South Korea
서울 은평구 증산서길 62
Geolocation: 37.582211, 126.905492
To get here: Jeungsan-Yeog Station [증산역], Line 6, Exit 4
— submitted by Marion KDL & Mich