Yukimura Aine is an ordinary high school girl who is only good at Japanese language. One day, she loses the lyrics she wrote for a lyric recruitment event, only to hear them again at a packed Tokyo Dome concert with 50,000 enthusiastic fans! It turns out her lyrics were picked up by Taigauchi Sekiya, the lead singer of the super-popular band Lucifer... Sekiya instinctively senses that Aine can write lyrics that capture the hearts of young girls, so he forces her to write erotic lyrics for Lucifer. How will Aine face this situation?