Series

21 Days Theory

★ 7.0(8)202238m1 season

21 Days Theory isn't available to stream, rent or buy in Ireland right now. Availability changes often, so check back soon. Availability checked 30 June 2026.

Where to watch 21 Days Theory

🇮🇪 Ireland

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

Good to know

Creator: Choi Sittichai Chutsiri
Release date: 2022-08-07
Runtime: 38m
Language: Thai
Seasons: 1
Episodes: 4
Network: YouTube
Status: Ended

21 Days Theory — trailer

About 21 Days Theory

21 Days Theory is a 2022 web series in the Drama genre, created by Choi Sittichai Chutsiri, starring Patsapon Jansuppakitkun, Khunakorn Sunantham and Prat Itthichaicharoen. It spans 1 season and 4 episodes, and originally aired on YouTube. It holds an average rating of 7.0/10 from 8 viewers. Below you can see where to watch 21 Days Theory in Ireland — across streaming, rental and purchase options — along with the full cast, trailer and viewer reviews.

Synopsis

A playful rivalry turns into something more when a cocky senior dares his classmate to win the school’s top celebrity’s heart in just 21 days.

Seasons (1)

Season 14 eps · 2022

Cast

Patsapon Jansuppakitkun

Khunakorn Sunantham

Prat Itthichaicharoen

Toy

Jirayu Sahguansin

Frank

Warisara Jitpreedasakul

Mind

Pischapron Ketawattananon

Mook

Sarawut Siriphet

Man

Themes & keywords

betlove at first sightcoming outfriendshiphigh schoolbased on true storyromancecoming of ageminiserieswageruncle nephew relationshiphidden agendabilingualmother son relationshipgay romance

Frequently asked questions

Where can I watch 21 Days Theory in Ireland?+

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

Is 21 Days Theory on Netflix?+

21 Days Theory is not on Netflix in Ireland right now.

How many seasons of 21 Days Theory are there?+

21 Days Theory has 1 season and 4 episodes in total.

Who stars in 21 Days Theory?+

21 Days Theory stars Patsapon Jansuppakitkun, Khunakorn Sunantham, Prat Itthichaicharoen, Jirayu Sahguansin and Warisara Jitpreedasakul.

When did 21 Days Theory come out?+

21 Days Theory is a 2022 web series created by Choi Sittichai Chutsiri.

What genre is 21 Days Theory?+

21 Days Theory is Drama series.

Who created 21 Days Theory?+

21 Days Theory was created by Choi Sittichai Chutsiri.