TV series

The 21-Day Theory 2025

TMDB 9.0 Drama

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

Watch free in the UK

Not listed as free in the UK right now.

Official trailer

Cast

  • Narikun Ketprapakorn
  • Supakorn Saokhor
  • Pataraphol Wanlopsiri
  • Dom Hetrakul

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