Yun Ha-Jun, who struggled to pursue his musical career despite his iffy talents and ended up sacrificing his own family along the way.

"If only I could turn back time...! "

One day, after living with regrets and alcohol for a while, he woke up and found himself had returned to the past. Just then, it dawned on him.

The fact that my younger sister is a musical genius...! Now is the time to turn my life around, by producing my younger sister into becoming the best singer!

(Source: Naver, translated)