Natsu Ga Owaru Made Natsu No Owari The Animation Extra Quality Site

This is the key. In pirated release groups, "Extra Quality" (or similar tags like "HQ," "1080p," "Remastered") indicates a fan upscale or a re-encode of the original low-resolution OVA to a higher resolution (e.g., 720p → 1080p). It is not an official term.

Smoother animation playback, often referred to as "60FPS" versions in community circles. This is the key

Anime, Slice-of-Life, Comedy, Romance