The 21-Day Theory

The 21-Day Theory (2025)

Drama

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

star 9
  • First Air Date: 2025-01-17
  • Last Air Date: 2025-02-07
  • Total Seasons: 1
  • Total Episodes: 4
  • Episode Runtime: 45 min.
  • Network: ONE 31, Viu
  • Director: Chainarong Tampong

Where to Watch The 21-Day Theory Online

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Seasons

  • Season 1

    4 Episodes

Trailer

Cast

  • Narikun Ketprapakorn

    Pie

  • Supakorn Saokhor

    Boss

  • Pataraphol Wanlopsiri

    Euro

  • Dom Haetrakul

    Barami

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