
After his boyfriend’s accident, a man wakes up in the past, forced to relive their love story and change fate without being discovered.

Episode 1
A lonely teen meets a mysterious neighbor who knows his birthday—then vanishes without a trace.

Episode 2
Years later, Suansoon prays for his injured love—then meets his high school–aged self once more.

Episode 3
Onsa and Suansoon grow closer through movies and late-night talks, blurring time and emotion.

Episode 4
As Suansoon moves to a new apartment, he meets another student next door—just like before.

Episode 5
Onsa plans a secret outing for Suansoon as their days together near a quiet, tender end.

Episode 6
Suansoon disappears after leaving Onsa a letter, sparking a desperate and tearful search.

Episode 7
At the theater, Onsa meets Suansoon for the “first” time—two souls crossing through time.

Episode 8
As graduation nears, Onsa and his friends share one last night at Nan’s café before goodbye.

Episode 9
In 2018, Onsa’s accident stirs memories from 2008—where fate links him to the name “Suansoon.”

Episode 10
Onsa reveals his name and leaves a letter for Suansoon as the school’s film night begins.

Episode 11
Suansoon chooses a new path—and a familiar voice answers when he calls about a vacant room.

Episode 12
Reunited at Nan’s café, Suansoon and Onsa finally find peace, love, and the friends they lost.