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.
You can now watch Blue Birthday online on the following streaming providers in the United States.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Episode 1 | 2021-07-23 | 30 min |
| Season 1 | Episode 2 | Episode 2 | 2021-07-24 | 30 min |
| Season 1 | Episode 3 | Episode 3 | 2021-07-30 | 30 min |
| Season 1 | Episode 4 | Episode 4 | 2021-07-31 | 30 min |
| Season 1 | Episode 5 | Episode 5 | 2021-08-06 | 30 min |
| Season 1 | Episode 6 | Episode 6 | 2021-08-07 | 30 min |
| Season 1 | Episode 7 | Episode 7 | 2021-08-13 | 30 min |
| Season 1 | Episode 8 | Episode 8 | 2021-08-14 | 30 min |
| Season 1 | Episode 9 | Episode 9 | 2021-08-20 | 30 min |
| Season 1 | Episode 10 | Episode 10 | 2021-08-21 | 30 min |
| Season 1 | Episode 11 | Episode 11 | 2021-08-27 | 30 min |
| Season 1 | Episode 12 | Episode 12 | 2021-08-28 | 30 min |
| Season 1 | Episode 13 | Episode 13 | 2021-09-03 | 30 min |
| Season 1 | Episode 14 | Episode 14 | 2021-09-04 | 30 min |
| Season 1 | Episode 15 | Episode 15 | 2021-09-10 | 30 min |
| Season 1 | Episode 16 | Episode 16 | 2021-09-11 | 30 min |
| Directing | Park Dan-hee | Director |
| Writing | Moon Won-young | Writer |
| Writing | Ku So-yeon | Writer |
| Camera | Kwak Kyung-ho | Director of Photography |
| Lighting | Jang Il-ji | Lighting Director |
