Melody Tome 1

While in a coma after a devastating car crash, an eleven-year-old musician named Melody mentally drifts into a world that hovers between life and death, where she meets a strange, fascinating woman who tells her that she can remain in the realm of the living so long as she agrees to accept a series of missions. Back in the real world, a fully recovered Melody is stunned to discover that when she sets out to complete the assignments given to her, she will be doing them.
in the body of her twenty-year-old self