Maquia is a member of a special race called the Iorph who can live for hundreds of years. However, Maquia has always felt lonely despite being surrounded by her people, as she was orphaned from a young age. She daydreams about the outside world, but dares not travel from her home due to the warnings of the clan's chief. One day the kingdom of Mezarte invades her homeland. They already have what is left of the giant dragons, the Renato, under their control, and now their king wishes to add the immortality to his bloodline. They ravage the Iorph homeland and kill most of its inhabitants. Caught in the midst of the attack, Maquia is carried off by one of the Renato. It soon dies, and she is left deserted in a forest, now truly alone save for the cries of a single baby off in the distance. Maquia finds the baby in a destroyed village and decides to raise him as her own, naming him Ariel. Although she knows nothing of the human world, how to raise a child that ages much faster than her.

Humanity's desperate battle to reclaim the Earth from Godzilla continues. The key to defeating the King of the Monsters may be Mechagodzilla, a robotic weapon thought to have been lost nearly 20,000 years ago.

Born and raised in the countryside of Japan, Hinako "Hina" Sakuragi gets anxious easily when she talks to new people—so much so that she resembles a stiff scarecrow. To overcome this, Hina hopes to get involved in theater, inspired by a play she saw during her school's field trip. So, Hina moves into the Hitotose Manor in the bustling city of Tokyo to study at Fujiyama High School, aspiring to join the school's renowned theatre club.

But to Hina's dismay, she learns that Fujiyama High's theatre club has been on a lengthy hiatus. Having already come to Tokyo and enrolled in the school, Hina is at a loss for what to do next. Sensing her disappointment and eagerness to learn theatre, Chiaki Hagino, the landlady of Hitotose Manor, encourages Hina to create a troupe with the residents of Hitotose Manor as its members.

This story follows Hina as she begins a new life in Tokyo attending Fujiyama High while learning the ropes of theatre with the support of her friends along the way.