Blue Birthday

Ha Rin visits her old neighborhood and retrieves Seo Jun's old photos; since the photos remind her of the pain, she burns one of them.

When Ha Rin realizes that she had traveled back in time, she looks for Seo Jun; the dreamlike reunion only lasts for a short time and she is back to the present.

Ha Rin decides to find out why Seo Jun had committed suicide 10 years ago; she checks what kind of books Seo Jun had rented, reaches out to his friends and also looks through his social media accounts.

Ha Rin makes up her mind to prevent Seo Jun's death; she goes back to the past to resolve the conflict Seo Jun had with his mother.

A woman goes back in time, through mysterious photos, to try to save her boyfriend's life.

Ha Rin manages to save Hye Min from her death; with Hye Min alive, Seo Jun is gone again; Ha Rin tracks down the clues to Seo Jun's death, and notices some weird things; she burns another photo to find out the truth.