At 30, Ha Shi-yeon was once the nation's sweetheart—a top female idol who dominated the stage. Now retired, she’s chasing her next dream: becoming a serious actress. But fate has other plans when she accidentally gets into a "fan incident" with Han Eun-gyeol, an underrated male idol from a small company. For someone used to being loved, Shi-yeon is shocked to realize she’s now the one fangirling—hard. Eun-gyeol isn’t just any idol; he’s her ultimate bias. Can she keep her identity a secret while navigating this double life of secret merch buys, covert fan meetings, and heart-fluttering encounters? As their worlds collide, will her past as an idol be exposed? Or will this chaotic, clandestine fan romance steal the spotlight?