High school girl Lee Haru’s life changes the day she hits her head and wakes up carrying fragments of a lonely salaryman’s past life along with an absurdly vast knowledge of J-Pop.

Armed with Vocaloid software and memories that feel both foreign and familiar, she begins uploading “covers” on NewTube under the name HALU. The songs are flawless. Too flawless. They don’t just go viral, they redefine what people think is possible for an amateur creator.

As fame rises, so do cracks in her reality. School life becomes harder to balance. Friends start noticing something strange. The online community debates whether HALU is a genius, a corporate plant, or something else entirely. VTubers reach out for collaborations, unknowingly pulling her deeper into the entertainment world she was never meant to enter.

But there’s one truth she refuses to face:

Everything she creates… was never truly hers.

They are all songs from a past world, songs belonging to someone else’s life.

And the more she succeeds, the closer she gets to the moment where the truth can no longer stay buried.