If you are looking for the original source of this content, you can purchase the complete collection on Blu-ray:
: Sourced from the official Blu-ray release, which features a high-definition 1080p MPEG-4 AVC encode.
: The video was compressed using the H.264/MPEG-4 AVC codec.
: The "Complete Collection" includes all 21 episodes and was released in high-definition.
This specific file naming convention is typical for "fan-rip" releases found on community forums and media databases. It indicates the following technical specifications:
: The creditless version of the ending theme, "Set Them Free" by Akira Jimbo.
You can also watch the series legally on the following platforms:
: Frequently stocks the Blu-ray version under the title Tonari no Seki-kun: The Master of Killing Time .