Kōtarō to Shiratori kyōdai wa Shinshū no minshuku o otozureta. Minshuku no ōnādearu tsuma no Ōsugi wa, hitorimusuko o byōki de nakushita shokku kara, koko 2kagetsu-kan kioku o ushinatte ita. Sono yoru, hanabi taikai no saichū ni kaijū no kodomodearu furaingureidoron ga chikyū ni tsuiraku suru. Urutoramantarō ga kaijū o kōgeki suru Chū, Ōsugi wa kare ni kō tsugeru...