The carefree journeys of the four girls continue! As their fleeting yet eventful summer becomes a distant memory, the arrival of fall signals a new school year with limitless opportunities. Even as the four girls return to their peaceful routine, the appearance of new faces enlivens the anything but exciting rural life of Asahigaoka.

Far from the hustle and bustle of urban life, and with only a single candy store and bus route to its name, the rural Asahigaoka is certainly not a place for everyone. Nevertheless, the village's children still manage to cheerfully spend their days exploring and having fun in the wilderness around them. One such child, Renge Miyauchi, the youngest of the group, looks forward to the entrance ceremony of the upcoming school year, signalling her entry into first grade and the beginning of her elementary school life. Attending the only school in town, Renge and her friends, seventh grader Natsumi Koshigaya and her eighth grade sister Komari, make the most out of their rural lifestyle, playing and studying everyday.

The story centers on Koyomi Araragi, a third year high school student who has recently survived a vampire attack, and finds himself mixed up with all kinds of apparitions: gods, ghosts, myths, and spirits.

Asahigaoka might look like typical, boring countryside to most; however, no day in this village can ever be considered colorless thanks to five students of varying ages occupying the only class in the only school in town. The youngest student is first grader Renge Miyauchi, who brings an unadulterated wit, curiosity, and her characteristic catchphrase, "Nyanpasu!" Then there are the Koshigaya siblings consisting of the quiet ninth grader and elder brother Suguru, diminutive eighth grader Komari, and the mischievous seventh grader Natsumi. The recent arrival of Tokyo-raised fifth grader Hotaru Ichijou, who appears overdeveloped for her age and thus naturally holds an air of maturity, rounds out this lively and vibrant group of five classmates.

The year is 1988, and in the midst of recovering from a near-miss with a large comet, Earth finds that there are much worse matters at hand: the sudden arrival of a strange army of aliens and their fleet of unstoppable warships.

Inventor Goro Ibuki creates a humanoid robot named Jet Jaguar. It is soon seized by an undersea race of people called the Seatopians. Using Jet Jaguar as a guide, the Seatopians send Megalon as vengeance for the nuclear tests that have devastated their society.

Reporter Goro Maki stumbles upon scientists conducting weather experiments on Sollgel Island in the South Seas. He discovers the island is inhabited by giant mantis and a woman named Saeko who's been cast away since the death of her father. The pair soon find a helpless infant monster that Godzilla must adopt and learn to raise as one of his own.

Manga artist Gengo Odaka lands a job with the World Children's Land amusement park only to become suspicious of the organization when a garbled message is discovered on tapes. As Gengo and his team investigate, Godzilla and Anguirus quickly decipher the message and begin their own plan of action.

Searching for his brother, Ryota stows away on a boat belonging to a criminal alongside two other teenagers. The group shipwrecks on Letchi island and discover the Infant Island natives have been enslaved by a terrorist organization controlling a crustacean monster. Finding a sleeping Godzilla, they decide to awaken him to defeat the terrorists and liberate the natives.

An Okinawan prophecy that foretells the destruction of the Earth is seeming fulfilled when Godzilla emerges to return to his destructive roots. But not all is what it seems after Godzilla breaks his ally Anguirus's jaw. Matters are further complicated when a second Godzilla emerges, revealing the doppelgänger as a mechanical weapon.

The film deals with the recruitment of race car driver Jiro Miki (Masao Kusakari) and his dog, Caesar, to a group of people who use ESP, psychokinesis, and other special mental abilities to fight crime.

Men are being murdered by a psycho called "The Telegian," who uses a matter-transmitting device to locate his victims.