In Okayama Prefecture, there is a passionate fan who supports the shy and introverted lowest-ranking member of the minor underground idol group 'ChamJam', named 'Maina', with all their heart. Since all their income goes to their favorite, they always wear the red gym uniform they had in 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 her entire strength and soul, will continue!!!!! In volume 5... 'ChamJam' appears in a "local advertisement"! Furthermore, they embark on a trip to Tokyo for a "release event"!! The Budokan is... no longer just a dream?!