A girl who barely speaks becomes the entire reason you keep watching. Her silence isn't a quirk to be fixed or explained away, it's the actual texture of how she moves through the world, and everyone around her has already accepted it as truth. Two episodes of nothing happening, which is exactly the point.
These are two unaired episodes of the Morita-san wa Mukuchi television series, released in 2012 alongside the fifth volume of the manga. As a short special set drawn from the same show, they offer more of its comedy and slice-of-life material for viewers who followed the broadcast run and want the episodes that never made it to air.