Quick Answer
Tonari no Seki-kun: The Master of Killing Time is streaming on Crunchyroll, HIDIVE. 21 episodes (~8h total watch time). Availability may vary by region.
Where to Watch Tonari no Seki-kun: The Master of Killing Time
Tonari no Seki-kun: The Master of Killing Time is currently on Crunchyroll, HIDIVE. Keep in mind that catalogs change by region — if you don't see it on your usual service, check the other platforms listed here.
Confirmed Streaming Platforms
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Anime licensing changes by region. If Tonari no Seki-kun: The Master of Killing Timeisn't on your usual service, try these.
About Tonari no Seki-kun: The Master of Killing Time
All Rumi Yokoi wants to do is focus during school, but she is constantly distracted by Toshinari Seki, her neighboring classmate. Paying attention during class is the least of Seki's worries, as he obsesses over intricate setups created using an assortment of items, from an elaborate domino course on his desk to a treacherous war played out with shogi pieces. Yokoi desperately attempts to focus in class, only to be repeatedly sucked into his intriguing eccentricities; however, they always seem...
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Where can I watch Tonari no Seki-kun: The Master of Killing Time legally?
Right now, Tonari no Seki-kun: The Master of Killing Time is on Crunchyroll, 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 Tonari no Seki-kun: The Master of Killing Time on Netflix or Crunchyroll?
It's confirmed on Crunchyroll. Netflix availability depends on your region — some countries have it, others don't.
Is Tonari no Seki-kun: The Master of Killing Time 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 Tonari no Seki-kun: The Master of Killing Time.
Can I watch Tonari no Seki-kun: The Master of Killing Time 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.