Following the disbandment of their former group, Yuki, a guitarist, and Santa, a drummer, embark on creating a new musical ensemble. With the addition of bassist Towa, young guitarist Atsuro, and the reluctant vocalist Sakuya, they establish Lucifer and navigate the challenges of the music industry while striving to maintain their unity. Amidst struggles with parental disapproval and witnessing their ex-bands' triumphs, the band copes with personal hurdles. Sakuya, haunted by a sorrowful history and entangled with teenage lyricist Aine, grapples the most with inner turmoil within the group.