Episode 1 S01 E01

Chae Seo-jin (as Park Hye-Joo) Lee Jong-hyun (as Joo Young-Choon) Seo Young-joo (as Bae Dong-Moon) Yeo Hoi-hyeon (as Son Jin) Min Do-hee (as Sim Ae-Sook) Bona (as Lee Jung-Hee) Cho Byeong-kyu (as Lee Bong-Soo) Lee Bom (as Park Gwi-ja) Kim Sun-young (as Jung-hee's mother) Kwon Hae-hyo (as Jung-hee's father) Park Ha-na (as Hong Do-hwa, Jung-hee's aunt) In Gyo-jin (as Oh Man-sang, Maths teacher) Kim Jae-hwa (as Drill Instructor)

adolescence 1970s high school romance coming of age student