In the drama “Age of Youth”, there are various locations used to shoot the drama. This page will mainly highlight the major backdrops of the drama.
Yonsei University
Yonsei University Sinchon campus was used as the university Jin-myeong, Ji-won, Ye-eun and Eun-jae attended. Parts of the campus were used to shoot the drama.
Visit Universities in Korea (Part 2)
Wolfgang’s Steakhouse
This location was used as Jin-myeong’s workplace for waitressing and where she worked with her love interest Jae-wan.
http://english.visitseoul.net/eat/Wolfgangs-Steakhouse-EN_/517
Cafe Bomdong (Yakdabang Bomdong)
Cafe Bomdong was used as the outer look of Belle Epoque which is where the five main characters live. The inside was not used for the house, instead, a set was separately built for the drama.
This video shows some of the locations highlighted in this page:
Age of Youth (Hello, My Twenties!) 