Currently available on 2 streaming services.

Streaming, rent, or buy Tonari no Seki-kun: The Master of Killing Time – Season 1:

Currently you are able to watch "Tonari no Seki-kun: The Master of Killing Time - Season 1" streaming on Crunchyroll, Crunchyroll Amazon Channel.

Cast

Hiro Shimono
Toshinari Seki (voice)
Kana Hanazawa
Rumi Yokoi (voice)