From Intercross:

Aoi has always been the delinquent kind of girl, not taking her future seriously. She's always being compared to her talented older sister, and she's already so fed up with it. As a child, she has always loved the flute, but even then, she gave up because of her lack of self-confidence. While in her secret quiet place, she runs into genius photographer Yohsuke who can hopefully give her the confidence to move on in life.