Streaming, rent, or buy K-ON! – Season 1:
Currently you are able to watch "K-ON! - Season 1" streaming on Amazon Prime Video, Amazon Prime Video with Ads, Hidive Amazon Channel or for free with ads on The Roku Channel. It is also possible to buy "K-ON! - Season 1" as download on Fandango At Home, Amazon Video, Apple TV.
You can also stream the title for free on Amazon Prime Video.