Series

The 21-Day Theory

★ 9.0(1)202545m1 season

The 21-Day Theory isn't available to stream, rent or buy in Mexico right now. Availability changes often, so check back soon. Availability checked 14 June 2026.

Where to watch The 21-Day Theory

🇲🇽 Mexico

No streaming, rental or purchase options are listed in Mexico right now. Availability changes often — try switching your region in the header.

Good to know

Release date: 2025-01-17
Runtime: 45m
Language: Thai
Seasons: 1
Episodes: 4
Network: ONE 31, Viu
Status: Ended
Country: Thailand
Studio: change2561

The 21-Day Theory — trailer

About The 21-Day Theory

The 21-Day Theory is a 2025 web series in the Drama genre, starring Narikun Ketprapakorn, Supakorn Saokhor and Pataraphol Wanlopsiri. It spans 1 season and 4 episodes, and originally aired on ONE 31 and Viu. It holds an average rating of 9.0/10 from 1 viewers. Below you can see where to watch The 21-Day Theory in Mexico — across streaming, rental and purchase options — along with the full cast, trailer and viewer reviews.

Synopsis

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

Seasons (1)

Season 14 eps · 2025

Cast

Narikun Ketprapakorn

Pie

Supakorn Saokhor

Boss

Pataraphol Wanlopsiri

Euro

Dom Hetrakul

Barami

Themes & keywords

based on true storygay themeboys' love (bl)melodrama

Frequently asked questions

Where can I watch The 21-Day Theory in Mexico?+

The 21-Day Theory is not currently listed on any streaming, rental or purchase service in Mexico. Availability changes often, so check back or switch your region.

Is The 21-Day Theory on Netflix?+

The 21-Day Theory is not on Netflix in Mexico right now.

How many seasons of The 21-Day Theory are there?+

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

Who stars in The 21-Day Theory?+

The 21-Day Theory stars Narikun Ketprapakorn, Supakorn Saokhor, Pataraphol Wanlopsiri and Dom Hetrakul.

When did The 21-Day Theory come out?+

The 21-Day Theory is a 2025 web series.

What genre is The 21-Day Theory?+

The 21-Day Theory is Drama series.