Info: "Mayonaka no Shadow Boy" is Hey! Say! JUMP's 4th single. The title was used as the theme song for the drama Scrap Teacher, starring Nakajima Yuto, Yamada Ryosuke, Chinen Yuuri, and Arioka Daiki. It peaked at #1 on the weekly Oricon charts and sold 266,193 copies in total. The single also ranked #21 on the yearly Oricon charts for 2008.