Devoted idol enthusiast Kousaku Hata faces a crushing blow when his beloved idol, Yuka Kusakabe, abruptly retires during the peak of her fame. Overwhelmed by despair, he withdraws from the world, only to be coaxed back to school by his friends. To his astonishment, Yuka reappears incognito as Ringo Kinoshita in his class. Encouraged by this extraordinary twist of fate, Kousaku resolves to seize the moment. With the encouragement of his peers and mentor, he embarks on a journey to draw close to his idol and unravel the enigma behind her premature exit from the limelight.