Age of Youth (Hangul: 청춘시대; Hanja: 靑春時代; RR: Cheongchunsidae; MR: Ch'ŏngch'unsidae) is a South Korean television series starring Han Ye-ri, Han Seung-yeon, Park Eun-bin, Ryu Hwa-young and Park Hye-soo. It replaced Mirror of the Witch and aired on cable network JTBC on Fridays and Saturdays at 20:30 (KST) for 12 episodes from July 22 to August 27, 2016.

A slice-of-life story about five college students who connect over the growing pains in their youth.

Main cast (Belle Epoque)
Han Ye-ri as Yoon Jin-myung – 28-year-old
Han Seung-yeon as Jung Ye-eun – 22-year-old
Park Eun-bin as Song Ji-won – 22-year-old
Ryu Hwa-young as Kang Yi-na – 24-year-old
Park Hye-soo as Yoo Eun-jae – 20-year-old
Lee Na-yoon as young Eun-jae

The men around the Belle Epoque

Yoon Park as Park Jae-wan – Jin-myung's love interest, Italian restaurant chef
Choi Deok-moon as Oh Jong-gyu – Yi-na's mystery man
Ji Il-joo as Go Doo-young – Ye-eun's boyfriend
Shin Hyun-soo as Yoon Jong-yeol – Eun-jae's boyfriend
Son Seung-won as Im Sung-min – Ji-won's male friend
Yoon Jong-hoon as Seo Dong-joo – Yi-na's friend

Extended cast

Kim Hyo-jin as Yoon Jin-myung's mother
Lee Kyung-shim (ko) as Ahn Jung-hee – Yoo Eun-jae's mother
Kim Yong-hee as dentist – Kang Yi-na's third lover
Min Sung-wook (ko) as restaurant manager
Yoon Jin-sol (ko) as Jo Hyun-hee – restaurant waitress
Han Jeong-woo (ko) as Kang Yi-na's second lover
Song Ji-ho as Kang Yi-na's stalker
Ha Eun-seol (ko) as Han Yoo-kyung – Jung Ye-eun's friend
Choi Bae-young (ko) as Song Kyung-ah – Jung Ye-eun's friend
Yoon Yong-joon as Shin Yool-bin – Yoo Eun-jae's crush
Tak Woo-seok
Kim Ryeo-eun
Oh Hyo-jin
Lee Na-hyun
Kim Kyung-nam
Kim Chang-hwan (ko) as insurance employee
Jung Yoo-min (ko) as dancing student
Nam Moon-cheol (ko) as Song Ji-won's father
Kwon Eun-soo as Yoon Jong-yeol's junior
Shin Yeon-sook (ko) as Yoo Eun-jae's aunt