Blue Birthday

The series tells the story of Oh Ha-rin, who travels to the past through mysterious photos left by her first love, Ji Seo-jun. Since they were eight years old, they had been close friends, but he died by suicide on her birthday ten years ago.

Cast

YERI

Oh Ha-rin

Yang Hong-seok

Ji Seo-jun

Lee Sang-jun

Cha Eun-seong

Kim Gyeol-yu

Do Su-jin

Ju Hyeon

Kim Ui-yeong