Out of all the existing file versions currently available on the internet,these should easily produce the clearest image for this anime overall.
The original files : https://nyaa.si/view/989288#com-13
( I tested around 20 or so other file versions of this anime )
This torrent is focused on overall quality at reasonable torrent size.
The files have good subs,with op/ed translation.
Great for long term storage.
Language : Japanese.
Subs : English.