In Okayama Prefecture, there is a minor underground idol group called 'ChamJam', and among them is the shy and introverted member 'Maina', who is the least popular. She has a passionate fan who dedicates everything in life to support her. Since all of their income goes to their favorite, this fan always wears the red gym uniform from high school. This legendary girl, 'Eripiyo', loves Maina so much that she famously bleeds from her nose during live performances! Until the day Maina stands on the Budokan stage... Eripiyo's idol otaku activities, fueled by all her strength and soul, will continue!! In volume 6, 'ChamJam' is set to have a two-man live with the idol group from Kagawa Prefecture, 'Stellights'!