At a CD store, Ichika Hoshino hears a song by Miku that she has never heard before. On the monitor, she sees a "Hatsune Miku" in a form she has never seen before, and couldn't help say it out loud, "Miku!?" Miku was surprised at the voice, her eyes meet Ichika's, but she disappears shortly after. Later, after a live performance on the street, the Miku that Ichika saw before appears on her smartphone. Miku looks sad a...