A young genius needs someone who understands her.

I intend to be that person.

After regressing into the body of a six-year-old, Kang Habin gets another chance to change the fate of his childhood friend, Seo Yeon-woo, who took her own life in his previous timeline.

This time, he wants to be there for her. Not just as a childhood friend, but as someone who understands her, supports her, and helps her rediscover the musical talent she once lost.

From kindergarten to piano lessons, their friendship gradually grows closer, bringing Habin into Yeon-woo's world and the lives of her family.

He may have been given a second chance, but this time, he has no intention of letting someone precious to him face everything alone.