The 21-Day Theory poster

TV Series

The 21-Day Theory (2025)

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Overview

Using the 21-Day Theory, a determined woman pursues a wealthy man to prove he's straight—but the truth defies her expectations.

Where to watch The 21-Day Theory

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Trailer

Seasons

Series cast

  • Narikun Ketprapakorn Narikun Ketprapakorn Pie 4 episodes
  • Supakorn Saokhor Supakorn Saokhor Boss 4 episodes
  • Pataraphol Wanlopsiri Pataraphol Wanlopsiri Euro 4 episodes
  • Dom Hetrakul Dom Hetrakul Barami 4 episodes