Kousaku Hata, an avid fan of idols, is devastated when Yuka Kusakabe, his favorite, announces her retirement unexpectedly at the height of her successful career. As her biggest supporter, he finds the news overwhelming and it leaves him in despair, causing him to isolate himself. However, at the urging of his friends, he returns to school and on this particular day, something extraordinary occurs. To his amazement, he discovers that his beloved idol is now a student in his class, going by the name of Ringo Kinoshita. This remarkable twist of fate fills Kousaku with renewed determination as he seizes the once-in-a-lifetime opportunity to pursue his dreams. With the help of his teacher and friends, he endeavors to get closer to the girl of his fantasies and uncover the reasons behind her exit from show business.