REXX burst onto the scene with a debut single that became an explosive hit. The band's members performed through mascots—no faces, no live shows, no direct public presence—and still built a devoted following entirely through word of mouth. Then they announced an indefinite hiatus with no explanation and released nothing further. The hiatus has lasted a year. REXX's debut single keeps selling. Protagonist Mochizuki Kazune transfers to a new school and finds a demo CD there with an unreleased REXX track—and then discovers that the five students who introduce themselves to her are REXX's actual members. They say they are done performing. She disagrees.