Series · 2025 · Drama

The 21-Day Theory

★9.0 2025 1 Season TV-MA

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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Seasons & episodes

1 season · 4 episodes

Episode 01

Episode 1

Jan 17, 2025 · 45 min

No description available.

Episode 02

Episode 2

Jan 24, 2025 · 45 min

No description available.

Episode 03

Episode 3

Jan 31, 2025 · 45 min

No description available.

Episode 04

Episode 4

Feb 7, 2025 · 45 min

No description available.

About the series

The 21-Day Theory poster

Audience score

★ 9.0 /10

based on 1 votes

Synopsis

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

Drama

Cast

4 principal cast

Narikun Ketprapakorn

Narikun Ketprapakorn

Pie

Supakorn Saokhor

Supakorn Saokhor

Boss

Pataraphol Wanlopsiri

Pataraphol Wanlopsiri

Euro

Dom Hetrakul

Dom Hetrakul

Barami

Where to watch The 21-Day Theory

The 21-Day Theory is available to stream on Flicksy via 6 verified sources, aggregated from publicly available embed providers. The drama has 1 season and 4 total episodes, rated 9.0/10 by 1 viewers.

Frequently asked

How many seasons does The 21-Day Theory have?

The 21-Day Theory has 1 season with 4 episodes in total.

Is The 21-Day Theory still on the air?

The 21-Day Theory has ended and is no longer in production.

What network airs The 21-Day Theory?

The 21-Day Theory airs on ONE 31, Viu.

When did The 21-Day Theory first air?

The 21-Day Theory first aired on January 17, 2025.