Where to watch 21 Days Theory in Japan
21 Days Theory isn't available to stream, rent or buy in Japan right now. Availability changes often, so check back soon. Availability checked 30 May 2026.
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 Japan — across streaming, rental and purchase options — along with the full cast, trailer and viewer reviews.
21 Days Theory trailer
Overview
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 episodes · 2022
Top cast
Themes & keywords
Frequently asked questions
Where can I watch 21 Days Theory in Japan?+
21 Days Theory is not currently listed on any streaming, rental or purchase service in Japan. Availability changes often, so check back or switch your region.
Is 21 Days Theory on Netflix?+
21 Days Theory is not on Netflix in Japan 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.
User reviews
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