Virtual pop band formed by video game producer Tetsuya Mizuguchi, including a revolving lineup of anonymous members. The female vocalist "Lumi" was created by combining the voices of 4 female vocalists using computer software. The concept is she is an 18 year-old Japanese girl, born in space 30 years in the future who has never been to Earth, hence that is the subject matter of her lyrics. In all of the group's videos, Lumi is created using computer animation. During "live" performances, holographic technology is used to project her image, combined with special effects.