Taiban! Tiny² Band Story
Mizuki Haruno, who has been spending her days feeling blue, was taken to a live concert by her childhood friend, Nozomi. She caught a glimpse of the "exciting world there."
"Nozomi...I want to play in a girls' band!"
The story of Mizuki who became a high-school student begins now! This is a rockin' youth story woven by the four individual girls from the music band at Hakumai High School in a town in Hokkaido!
[Source: Taiban! Official YouTube channel via MyAnimelist]