PREVIOUSLY: The six girls of NMIXX set off on a journey to reach MIXXTOPIA, a world where everyone's individuality is cherished. Experiencing many difficulties along the way, they fall victim to the villain Monopole's trap and even have their ship set aflame. While repairing the burned ship the girls stay in FIELD, confronting the stubborn prejudices of society and gathering people willing to travel to MIXXTOPIA. The newly repaired MMU sets sail safely once again. In order to reach MIXXTOPIA, NMIXX heads forth into a vast black hole.