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The 21-Day Theory poster

TV SERIES

The 21-Day Theory

2025 · 45 min · Drama

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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Official trailer

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Creators

Chainarong Tampong — Director

Top cast

Narikun Ketprapakorn portraitNarikun KetprapakornPieSupakorn Saokhor portraitSupakorn SaokhorBossPataraphol Wanlopsiri portraitPataraphol WanlopsiriEuroDom Hetrakul portraitDom HetrakulBarami

EPISODE GUIDE

Seasons

The 21-Day Theory Season 1 poster
Season 14 episodes · 2025

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