I ruined my life chasing a dream I never had the talent for.
I drained my family dry, lost my mother to overwork, and finally lost the one person who believed in me—my younger sibling.
The last thing they said still haunts me:

“I had my own dream too.”

When everything was already over, fate gave me another chance.

I woke up seventeen again.

This time, I swear I won’t make the same mistakes.
I won’t cling to my pride.
I won’t sacrifice my family for my own delusions.

Then I discover the truth.

My younger sister—the quiet, smiling kid who gave up everything for me—is a once-in-a-generation musical genius.

While I was an ordinary singer blinded by ambition, she had the voice that could conquer the world.

So I make a decision.

I won’t stand on stage anymore.
I’ll stand behind her.

Using my knowledge from a failed future, I enter Korea’s most brutal arts high school—not as a vocalist, but as a composer and producer. Among real geniuses, industry monsters, and future stars, I gamble everything on one goal:

Make my sister shine.
Protect her dream.
Rewrite both our futures.

A regression story about regret, family, talent, and redemption—
where the real genius isn’t the one who sings, but the one who finally learns who they should have been supporting all along.