Quick Answer
Z/X: Code Reunion is streaming on HIDIVE. 12 episodes (~5h total watch time). Availability may vary by region.
Where to Watch Z/X: Code Reunion
Z/X: Code Reunion is officially streaming on HIDIVE. Availability depends on your region, so we've also listed search links for other major platforms below.
Confirmed Streaming Platforms
Subscription availability by JustWatch
More Ways to Watch Z/X: Code Reunion (US)
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Check Other Platforms
Anime licensing changes by region. If Z/X: Code Reunionisn't on your usual service, try these.
About Z/X: Code Reunion
The signing of a peace treaty has secured a tenuous ceasefire between mankind and the Zex, beings who emerged from space/time rifts connected to mysterious, distant worlds. Partnered with a Zex named Rigel, Azumi Kakamigahara must shoulder the fate of her own idyllic world. The unlikely pair head to newly established Fujimisaki Academy, where their destinies await. (Source: ANN)
Full details on MyAnimePulseFrequently Asked Questions
Where can I watch Z/X: Code Reunion legally?
Right now, Z/X: Code Reunion is on HIDIVE. That said, anime licensing varies a lot by country — what's on Netflix in Japan might not be on Netflix in the US. If your go-to platform doesn't have it, try the other services listed above.
Is Z/X: Code Reunion on Netflix or Crunchyroll?
Can't confirm either right now. Both platforms rotate their catalogs pretty often, so it's worth searching directly on each one.
Is Z/X: Code Reunion available with an English dub?
Dub availability depends on the platform. Crunchyroll has been expanding their dubbed library a lot recently, and Funimation (now merged into Crunchyroll) historically had the biggest dub catalog. Check each platform's listing for Z/X: Code Reunion.
Can I watch Z/X: Code Reunion for free?
Crunchyroll offers a free ad-supported tier for some shows. Most other platforms require a subscription, but many offer free trials for new users. Tubi and Pluto TV occasionally have anime in their free rotation too.