The 21-Day Theory
2025•1 Seasons•4 Episodes•9.0•Ended
Drama
Using the 21-Day Theory, a determined woman pursues a wealthy man to prove he's straight—but the truth defies her expectations.
Network
ONE 31, Viu
Origin
TH
Cast
Narikun Ketprapakorn
Pie
Supakorn Saokhor
Boss
Pataraphol Wanlopsiri
Euro
Dom Hetrakul
Barami
Episodes
Recommended
7.5
The Newsreader
2021
9.2
Ticket to Heaven
2026
8.6
Heartstopper
2022
8.2
The Boy Next World
2025
8.5
Your Sky
2024
7.5
House of Guinness
2025
8.2
Affair
2024
7.8
Dare You to Death
2025
8
Oxygen: The Series
2020
7.7
Bel-Air
2022
8.3
Dangerous Romance
2023
8.6
The Eclipse
2022
7.7
The Miracle of Teddy Bear
2022
8.4
Only Friends
2023
7
Life on Top
2009
8.3
Tyler Perry's Ruthless
2020
7.3
Julia
2022
6.9
Offspring
2010
6.8
Unchosen
2026
8.3
My Stand-In
2024
Similar Shows
가능성 제로 로맨스
2026
The Siege
0
9
Diary of Tootsies
2016
7.2
HIStory
2017
6.9
Advance Bravely
2017
7
Venus's Groom
2026
8.2
Bed Friend
2023
7.2
The Bombing of Pan Am 103
2025
8.5
The Glory
2022
Summer Indigo
2025
7.4
Mi adorable maldición
2017
7.2
The Middleman's Love
2023
7.2
Siege 55
2023
7.5
Last Meal Universe
2025
9.5
Last Twilight
2023
8
Hidden Agenda
2023
7.8
A Boss And A Babe
2023
8.4
Only Friends
2023
8.3
The Next Prince
2025
10
Slam Dance the Series
2017