21 Days Theory
2022•38m•7.0/10
Drama
Ratings
🎬TMDb
7.0/10(8)
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.
Language
TH
Status
Ended
First Aired
August 7, 2022
Last Aired
August 28, 2022
Networks
YouTube
Created By
Choi Sittichai Chutsiri
Trailers & Videos
Where to Watch
Region US · Lang EN
US
No providers available for this region.
Available in Your Library
Seasons & Episodes
Select a season to view episodes. Reddit links may contain spoilers.
Season
E1
Episode 1
Air date: 2022-08-07
Q meets X and is challenged to beat him in 21 days—sparking rivalry and unexpected bonds.
E2
Episode 2
Air date: 2022-08-14
After X’s injury, Q tends to him closely, giving them a chance to see each other differently.
E3
Episode 3
Air date: 2022-08-21
As their days together grow, Q’s feelings shift, and mutual understanding slowly deepens.
E4
Episode 4
Air date: 2022-08-28
At a turning point, Q and X 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
Recommended
Checking...
Your Sky
2024•
8.4
Checking...
One Tree Hill
2003•
7.8
Checking...
Heartstopper
2022•
8.6
Checking...
Heated Rivalry
2025•
8.7
Checking...
The Fosters
2013•
7.5
Checking...
I Told Sunset About You
2020•
8.6
Checking...
Pit Babe
2023•
7.9
Checking...
Only Friends
2023•
8.4
Checking...
My Life with the Walter Boys
2023•
7.8
Checking...
We Are
2024•
8.6
Checking...
The Newsreader
2021•
7.4
Checking...
South of Nowhere
2005•
7.3
Similar TV Shows
Checking...
Who Are You: School 2015
2015•
7.6
Checking...
Grease: Rise of the Pink Ladies
2023•
6.2
Checking...
VIP
2019•
6.5
Checking...
Kaguya-sama: Love Is War - Mini
2021•
4.2
Checking...
La pecera de Eva
2010•
4.0
Checking...
When We Go to War
2015•
8.0
Checking...
The Disappearance
2015•
6.5
Checking...
Kurt Seyit & Sura
2014•
8.0
Checking...
Mujeres engañadas
1999•
7.2
Checking...
Family
1994•
8.0
Checking...
The Love by Hypnotic
2019•
7.7
Checking...
Silent
2022•
7.3