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Her first love passed away on her 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.

Series Cast

  1. Yeri as Oh Ha-rin


    Oh Ha-rin

    16 Episodes

  2. Yang Hong-seok as Ji Seo-jun

    Yang Hong-seok

    Ji Seo-jun

    16 Episodes

  3. Lee Sang-jun as Cha Eun-seong

    Lee Sang-jun

    Cha Eun-seong

    16 Episodes

  4. Kim Gyeol-yu as Do Su-jin

    Kim Gyeol-yu

    Do Su-jin

    16 Episodes

  5. Ju Hyeon as Kim Ui-yeong

    Ju Hyeon

    Kim Ui-yeong

    16 Episodes

  6. Kim Yi-seo as Ji Hye-min

    Kim Yi-seo

    Ji Hye-min

    12 Episodes

  7. Lee Dong-ju as Kim Sin-u

    Lee Dong-ju

    Kim Sin-u

    5 Episodes

Full Cast & Crew

Last Season

Season 1

2021 • 16 Episodes

Season 1 of Blue Birthday premiered on July 23, 2021.

My Blue Birthday

(1x16, September 11, 2021) Season Finale

View All Seasons

Blue Birthday
Blue Birthday


Original Name 블루버스데이

Status Ended


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Type Scripted

Original Language Korean


Content Score 


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  • Created by credit

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