TMBTMB
TMBTMB

Track, discover and find where to watch TV shows and movies.

Discover

  • Movies
  • TV Shows
  • Browse
  • Topics

Account

  • Watchlist
  • Watched
  • Ratings

Legal

  • Privacy Policy
  • Terms of Service
  • Content Policy

© 2026 Movie Browser. All rights reserved.

Data provided by TMDB

Home
Browse
Watchlist
backdrop
backdrop
logo
Mini Series
TMDB
90

The 21-Day Theory (2025)

Latest Episode

Episode 4
45 min

Season 1 • Episode 4

Latest

Episode 4

Feb 7, 2025

Overview

Drama

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

Flag of THTHThai
Content warning
gay themebased on true storyboys' love (bl)melodrama
First AiredJan 17, 2025
StatusEnded
Seasons1·Episodes4
ONE 31
Viu

Top Cast

Narikun Ketprapakorn

Narikun Ketprapakorn

Pie

Supakorn Saokhor

Supakorn Saokhor

Boss

Pataraphol Wanlopsiri

Pataraphol Wanlopsiri

Euro

Dom Hetrakul

Dom Hetrakul

Barami

YouTube

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

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

Gallery

Reviews

No ratings yet

Start the discussionBe the first to post — spoiler-safe
Rate & reviewBe the first to weigh in

Recommended

The Newsreader series poster (2021)
7.5

The Newsreader

The Boy Next World series poster (2025)
8.3

The Boy Next World

Your Sky series poster (2024)
8.3

Your Sky

Affair series poster (2024)
8.1

Affair

Heartstopper series poster (2022)
8.6

Heartstopper

House of Guinness series poster (2025)
7.6

House of Guinness

Dangerous Romance series poster (2023)
8.3

Dangerous Romance

Only Friends series poster (2023)
8.3

Only Friends

Dare You to Death series poster (2025)
7.8

Dare You to Death

Bel-Air series poster (2022)
7.7

Bel-Air

My Stand-In series poster (2024)
8.1

My Stand-In

Eyewitness series poster (2016)
7.3

Eyewitness

Mary & George series poster (2024)
7.1

Mary & George

Julia series poster (2022)
7.3

Julia

Love Sea series poster (2024)
7.5

Love Sea

More Like This

LOVE³ series poster

LOVE³

Awaiting Dawn series poster (2025)
4.0

Awaiting Dawn

S.C.I. Mystery series poster (2018)
7.8

S.C.I. Mystery

Star and Sky: Sky In Your Heart series poster (2022)
7.0

Star and Sky: Sky In Your Heart

Pandora: Beneath the Paradise series poster (2023)
5.2

Pandora: Beneath the Paradise

PUNKS△TRIANGLE series poster (2025)
8.2

PUNKS△TRIANGLE

Second Chance series poster (2021)
6.2

Second Chance

Bad Buddy series poster (2021)
8.5

Bad Buddy

Diving Into Love series poster (2021)
4.0

Diving Into Love

Precise Shot series poster (2020)
5.8

Precise Shot

Fish Upon The Sky series poster (2021)
7.2

Fish Upon The Sky

Init sa Magdamag series poster (2021)
10.0

Init sa Magdamag

This Boy Is a Professional Wizard series poster (2016)
4.8

This Boy Is a Professional Wizard

Deal Lover series poster (2021)
3.0

Deal Lover

I Am Syd Stone series poster (2020)
3.4

I Am Syd Stone

Discussion

Browse per-episode discussions →

Sign in to join the discussion — comments are spoiler-gated to your watch progress.

Discussion starters

View all comments →