Absolute Zero

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

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

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

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

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

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