1. If Math Doesn't Define Zero, Then I'll Be The Answer
A lonely teen meets a mysterious neighbor who knows his birthday—then vanishes without a trace.
Absolute Zero — Season 1
After his boyfriend’s accident, a man wakes up in the past, forced to relive their love story and change fate without being discovered.
2. Will A Cup Of Coffee Even Be Bitter, If There's A Teardrop In It?
Years later, Suansoon prays for his injured love—then meets his high school–aged self once more.
3. If My Life Is Shrouded In Darkness, Then You Will Be The Bright Light Beaming Through
Onsa and Suansoon grow closer through movies and late-night talks, blurring time and emotion.
4. If This World Is A Movie Theater, You're A Romance Movie
As Suansoon moves to a new apartment, he meets another student next door—just like before.
5. If We Both Lose Something, Who Will Get Hurt More?
Onsa plans a secret outing for Suansoon as their days together near a quiet, tender end.
6. If We Can Start Over, My Answer Will Still Be The Same
Suansoon disappears after leaving Onsa a letter, sparking a desperate and tearful search.
7. If Love Is Sky, Then I'll Be The Ocean
At the theater, Onsa meets Suansoon for the “first” time—two souls crossing through time.
8. If The Beginning Is No Longer A Beginning, Would The End Turn Out The Same?
As graduation nears, Onsa and his friends share one last night at Nan’s café before goodbye.
9. If The Plant Is Dead Long Ago, I Would Keep The Pot To Collect Its Debris
In 2018, Onsa’s accident stirs memories from 2008—where fate links him to the name “Suansoon.”
10. If I Could Wish for One Thing, I Would Ask for Us Not to Meet Each Other.
Onsa reveals his name and leaves a letter for Suansoon as the school’s film night begins.
11. If Your Tears Are About to Drop onto the Earth, I'll Cry with You
Suansoon chooses a new path—and a familiar voice answers when he calls about a vacant room.
12. To Ong-Sa Who Has Lost, and to Suansoon for All the Fractions in Our Relationship.
Reunited at Nan’s café, Suansoon and Onsa finally find peace, love, and the friends they lost.