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Quick Answer
- BT21 Original Story(ONA · 14 eps)
- BT21 Original Story 2nd Season(ONA · 5 eps)
- BT21 Universe Animation(ONA · 8 eps)
- BT21 Universe 3 Animation(ONA · 8 eps)
Total: ~35 episodes / 14h watch time
BT21 Original Story Watch Order(2026)
The BT21 Original Story franchise has 4 entries and watching them in the wrong order can spoil some big moments. Here's the breakdown — main series, movies, OVAs, and where each one fits.
4 entries ~14h total4 series
Full Watch Order (Release Order)
Frequently Asked Questions
What's the best order to watch BT21 Original Story?
Release order. Start with BT21 Original Story and go down the list. This is how the creators intended the story to unfold — later entries build on what came before, and watching out of order can spoil key reveals.
How long does it take to watch all of BT21 Original Story?
About 14 hours total across 35 episodes and 4 entries. At 3-4 episodes per day, that's roughly 10 days.
Can I skip the movies and OVAs?
This franchise is mostly main series content with no standalone movies or OVAs to worry about.
Release order or chronological order?
Go with release order for your first time through. Chronological can be tempting, but shows are written with release order in mind — reveals hit harder and character arcs make more sense. Save chronological for a rewatch if you want a different perspective.
More about BT21 Original Story
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