Kyou Nukui is a high school shut-in who spends his days creating and uploading music online. One day he gets a request from a fan to meet, and is understandably surprised when his fan turns out to be a ten-year-old girl named Jun. Now, he has the task of helping the young Jun and her sisters in their dream of forming their own band.
During middle school, Kyou suffered from bullying after a classmate found his personal writing. Kyou refused to return to school afterward.