My Younger Sister Was a Genius

Synopsis

Yoon Hajoon, who struggled to pursue his musical career despite his iffy talents and ended up sacrificing his own family along the way, wishes to turn back time. One day, after living with regrets and alcohol for a while, he wakes up and finds himself returned to the past. Then he realizes his younger sister is a musical genius. Now is the time to turn his life around by producing his younger sister to become the best singer.