Remugyo, a giant spirit monster, appears at Domori Elementary and lays eggs on the backs of Nube's students. Knowing the eggs will kill them once they hatch, Nube faces a nightmare worsened by Remugyo's terrifying ability to regenerate. As Tamamo attempts to learn the secret to Nube's incredible power, the eggs begin to hatch. Nube bets his life on one last desperate attempt to save his students.