The ChamJam leader and unwavering center, Reo Igarashi, is graduating…!? Everything about seriously "supporting" someone is here. There is an enthusiastic fan who dedicates their entire life to supporting the shy and introverted lowest-ranking member, Maina, of the minor underground idol group ChamJam, which is active in Okayama Prefecture. Their income goes to supporting their favorite, so they wear a red tracksuit from high school. They love so much that they get a nosebleed during live performances… the legendary woman, Eripiyo! Until the day Maina stands on the Budokan stage… Eripiyo's all-out idol otaku activities will continue!! The story has taken the media by storm with a TV anime adaptation, live-action drama, and live-action movie. A bestseller with a total of 2.5 million copies sold. The long-awaited latest volume 10!!!