Charm-Checked Countdown Panic

A ZEROSE fan-club girl and boy crash through a locked backstage service corridor with a borrowed tour badge, only to find it leads to a “quiet room” where ZEROBASEONE’s rehearsal recordings are being swapped with wrong takes. The fan protagonist spots the same plastic bracelet they traded at a fan-sign—on a table labeled with tonight’s stage order—except the bracelet is missing one charm and the room smells like fresh paint. While the idols rehearse under bright spotlights, the corridor’s exit counts down on a wall screen, and every wrong take forces a different choreography choice that could injure someone on live broadcast. To fix it, the protagonist has to choose between handing the badge to staff and keeping the only clue close, before the countdown hits zero at soundcheck.