The 21-Day Theory
2025 Drama 1 season
TMDB rating 9.0/10 Ended
Using the 21-Day Theory, a determined woman pursues a wealthy man to prove he's straight—but the truth defies her expectations.
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Seasons1
Using the 21-Day Theory, a determined woman pursues a wealthy man to prove he's straight—but the truth defies her expectations.
All episodes available
Cast and details
Narikun KetprapakornPie
Supakorn SaokhorBoss
Pataraphol WanlopsiriEuro
Dom HetrakulBarami
- Network
- ONE 31, Viu
- First aired
- Jan 17, 2025
- Latest episode
- Feb 7, 2025
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Release dates are original schedules and may differ from availability in your country. A release never marks anything as watched. Last checked Nov 3, 2026.