

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.
Drama • Series • 2022 • 1 season
Starring: Patsapon Jansuppakitkun, Khunakorn Sunantham, Prat Itthichaicharoen
Created by: Choi Sittichai Chutsiri

S1 E1 - Episode 1
Q meets X and is challenged to beat him in 21 days—sparking rivalry and unexpected bonds.
Aug 7, 2022 • 39m

S1 E2 - Episode 2
After X’s injury, Q tends to him closely, giving them a chance to see each other differently.
Aug 14, 2022 • 38m

S1 E3 - Episode 3
As their days together grow, Q’s feelings shift, and mutual understanding slowly deepens.
Aug 21, 2022 • 44m

S1 E4 - Episode 4
At a turning point, Q and X must face whether the “21-day theory” will define their future.
Aug 28, 2022 • 40m
21 Days Theory
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.
Drama • TV Series • 2022