K-On! wallpaper with the light music club members in their school uniforms.

Looks like a fan art (not by me). Click image for full 1600×1200 size:

BTW, the Sakuragaoka Girl’s High School in the anime is fictional.

However, like many KyoAni productions it’s set on real location; this time it’s the Toyosato Elementary School in Shiga Prefecture.

Pretty sure there will be fans going on a pilgrimage trip soon.