Joe can't remember who he is or even his name, and the members of his band, Precious Stone, are worried about him. He restarts the band even as his memory fades, but then several fateful meetings happen. Ayano, the mysterious girl who calls herself Joe's girlfriend. Kiyoshi, the shady producer trying to make Precious Stone into a major band. Through several unexpected encounters, the band progresses rapidly. But what of Joe and Ayano's hidden past?