Set in the 1990s, the drama centers around a female high school studentShi Won, who idolizes boyband H.O.T. and her 5 high school friends in Busan. As the timeline moves back and forth between their past as 18-year-old high schoolers in 1997 and their present as 33-year-olds at their high school reunion dinner in 2012, one couple will announce that they're getting married.
Season 2: ''Reply 1994''
Set in 1994, six university students from various provincial areas live together at a boarding house in Sinchon, Seoul, run by a couple with a daughter named Na Jung. The timeline moves back and forth between the past in 1994 and the present in 2013, making the viewers guess who will become Na Jung's husband among the male characters. The series follows the pop culture events that happened between 1994 and the years that follow, including the emergence of seminal K-pop group Seo Taiji and Boys and the Korean Basketball League.
Season 3: ''Reply 1988''
Set in the year 1988, it revolves around five friends and their families living in the same neighborhood of Ssangmun-dong, Dobong District, Northern Seoul. Five childhood friends, who all live in the same Ssangmundong neighborhood of Seoul, lean on each other to survive their challenging teen years and set a path for their futures. Sung Deok Sun struggles for attention as the middle child in her poor family while also carrying the burden of her 989th ranking in school. Kim Jung Hwan only has a one-track mind for soccer, even after his family becomes rich overnight. Sung Sun Woo is the perfect student, student council president and a caring and dependable son in his family. Ryu Dong Ryong is a geek who knows more about girls and life than the rest of his friends, but his poor academic score prevents him from being able to go to college. Choi Taek is a genius baduk player who dropped out of school to go professional.
Cast
Principal
! Jung Eun-ji ! Seo In-guk ! Hoya ! Shin So-yul ! Eun Ji-won ! Lee Si-eon ! Go Ara ! Jung Woo ! Yoo Yeon-seok ! Kim Sung-kyun ! Son Ho-jun ! Baro ! Min Do-hee ! Lee Hye-ri ! Park Bo-gum ! Go Kyung-pyo ! Ryu Jun-yeol ! Lee Dong-hwi ! Sung Dong-il ! Lee Il-hwa ! Song Jong-ho ! Noh Ji-yeon ! Jung Kyung-mi ! Kim Sun-ah ! Yook Sung-jae ! Shin Soo-yeon ! Yoon Jong-hoon ! Yeon Joon-seok ! Ryu Hye-young ! Choi Sung-won ! Ra Mi-ran ! Ahn Jae-hong ! Kim Sun-young ! Kim Seol ! Choi Moo-sung ! Yoo Jae-myung ! Lee Min-ji ! Lee Se-young ! Song Young-kyu ! Lee Mi-yeon ! Kim Joo-hyuk ! Jeon Mi-seon ! Woo Hyun ! Yong Young-jae ! Bae Yoo-ram