The 21-Day Theory poster
Series202545 min / epEnded

The 21-Day Theory

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

Drama
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Language
TH
Original release language
Production
change2561
Lead production company
Scope
1 season
4 episodes
My Thoughts
Cast
Top billed cast from TMDB credits.

Featured Cast

#1

Narikun Ketprapakorn

Pie

#2

Supakorn Saokhor

Boss

#3

Pataraphol Wanlopsiri

Euro

#4

Dom Hetrakul

Barami

Crew
Key crew roles and departments.
Chainarong Tampong

Chainarong Tampong

Director

Directing

SH

Siwarat Harnpanich

Screenstory

Writing

PP

Pae Pitru Polchana

Compositor

Crew

Vorarit Vaijairanai

Vorarit Vaijairanai

Executive Producer

Production

PP

Paiboon Phupradub

Director of Photography

Camera

Videos
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Videos

“เป็นแฟนกัน 21 วัน” สุดท้ายแล้วทฤษฎีนี้จะลงเอยแบบไหน ? [Club Friday The Series ทฤษฎี 21 วัน Trailer]

Trailer

Images
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Images

EN

1920 × 1080

Image

1920 × 1080

EN

1440 × 2160

Seasons
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Seasons

Season 1

Season 1

4 episodes • 2025

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Ratings
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TMDB Score

9.0

from 1 ratings

Certification

N/A

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Homepage

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External official link