S01E01 Episode 1
Kiu meets Ek and is challenged to beat him in 21 days—sparking rivalry and unexpected bonds.
21 Days Theory
Overview
A playful rivalry turns into something more when a cocky senior dares his classmate to win the school’s top celebrity’s heart in just 21 days.
Episodes
S01E02 Episode 2
After Ek’s injury, Kiu tends to him closely, giving them a chance to see each other differently.
S01E03 Episode 3
As their days together grow, Kiu’s feelings shift, and mutual understanding slowly deepens.
S01E04 Episode 4
At a turning point, Kiu and Ek must face whether the “21-day theory” will define their future.
Cast
Patsapon Jansuppakitkun
X
Khunakorn Sunantham
Q
Prat Itthichaicharoen
Toy
Jirayu Sahguansin
Frank
Warisara Jitpreedasakul
Mind
Pischapron Ketawattananon
Mook
Sarawut Siriphet
Man
