A commotion in 'ChamJam'?! The [Member Popularity Poll] is being held!!! 'ChamJam' is a minor underground idol group active in Okayama Prefecture. Among them is the shy and introverted member, 'Maina', who ranks the lowest in popularity. However, there is an enthusiastic fan who bets everything on supporting 'Maina'. This fan dedicates all their income to Maina, always wearing the red gym uniform from their high school days. So devoted that during a live performance, they famously had a nosebleed... the legendary lady 'Eripiyo'! Until the day Maina stands on the Budokan stage... Eripiyo's idol otaku activities, filled with all her strength and soul, will continue! ♥♥♥