is a Japanese manga series written and illustrated by Harold Sakuishi. It was originally serialized in Monthly Shonen Magazine from 1999 to 2008, with the 103 chapters later published into 34 tankobon volumes by Kodansha. It tells the story of a group of Japanese teenagers who form a rock band and their struggle to fame, focusing on 14-year-old Yukio "Koyuki" Tanaka, who until meeting guitar prodigy Ryusuke Minami was an average teen with a boring life.