The rooftop of this building appears as search engine company Unicon’s rooftop in Search: WWW/Type in Search Word: WWW (검색어를 입력하세요: WWW) (tvN, 2019), which Song Ga-gyeong (Jeon Hye-jin) often heads up to for a time of reflection (as seen in episode 3), and the occasional conversation or confrontation.
Hongdae Aekyung Tower [홍대애경타워] is the headquarter building of conglomerate Aekyung Group, which produces cosmetics and healthcare products. Aside from offices, the building also houses a shopping mall and the hotel Holiday Inn Express Seoul Hongdae [홀리데이 인 익스프레스 서울 홍대]. It is located in Seoul’s neighborhood Dongyo [Donggyo-dong/동교동] in the Mapo District [Mapo-gu/마포구].
Fun fact: In Search: WWW, the Barro office HQ can be seen from the rooftop; however, this is actually the main Daegu Bank Headquarters [대구은행 본점], and is not actually located in Seoul. This, along with the Daegu Suseong Post Office [대구수성우체국] — added to the right of the ‘Barro’ building, and doubled in height — appears to have been digitally added to the scene.
188 Yanghwa-ro, Mapo-gu, Seoul, South Korea
서울특별시 마포구 양화로 188
Geolocation: 37.557616, 126.926556
Hongik University Station [홍대입구역], Seoul Subway Line 2/AREX/Gyeongui–Jungang Line, Exit 4
▶ Step out and you’re right there!
— submitted by Mich KDL; last updated 29/05/2022
— additional information from GGRIP