Dongsaengi Cheonjaeyeotda

Yun Ha-Jun spent years desperately chasing a musical career, clinging to ambitions that far exceeded his mediocre talents. His relentless pursuit of stardom came at a devastating cost, ultimately leading him to sacrifice the very family he should have protected. Left with nothing but bitter regrets and a heavy reliance on alcohol, he lived a hollow existence, constantly tormented by a single, agonizing wish: if only he could turn back time and undo his mistakes. Miraculously, that desperate wish is granted. After waking up one day, Ha-Jun finds himself inexplicably transported back to the past, given a second chance at life. As he adjusts to this sudden reversal of fate, a startling realization finally dawns on him—a truth he had been too blinded by his own ego to notice before. His younger sister possesses an extraordinary, undeniable gift for music. She is a true genius. Armed with the foresight of his past failures and a renewed sense of purpose, Ha-Jun resolves to completely rewrite his destiny. Rather than pursuing his own futile dreams, he decides to step behind the scenes. He dedicates himself to becoming her producer, determined to guide his talented younger sister to greatness and transform her into the world's finest singer.