Yoshino Nagawa is the vocalist and lyricist for the South Matsumoto High Punk Rock Society, a band of four high school girls striving to achieve their dream of performing at a music festival. She has written the band's original songs, including "Sayonara My Loneliness" and "自分自信 (Jibun Jishin)," which are performed in their story. The narrative takes place in Matsumoto City, Nagano Prefecture.