In the abyss at the end of the parallel world beyond the earth, there are twelve magic fairy seals, which seal a host of demons from the ancient times, and each seal is guarded by a cute little magic fairy. One day, the demon fairies were badly hurt and the clan leaders were in turmoil. The king of the clan faked a secret order from the queen to summon the twelve magic fairies, but in fact set up a game ready to slaughter them, and the weakest magical music fairy because of severe procrastination was late, lucky to escape a disaster, in order to save the little one, music fairy open a trace of the seal to borrow the power of the demons ...