Time Travel Shoujo is based on a 1983 book titled Jishaku to Denki no Hatsumei Hakken Monogatari by Japanese educator Kiyonobu Itakura. It is part of the Hatsumei Hakken Monogatari Zenshuu series which describes the story of various scientific discoveries and inventions throughout history. The 1983 book focuses on discoveries related to magnetism and electricity.

In the future, humans are living on colonized planets and are controlled in every aspect of their life by a system of computers. Evolution has resulted in the birth of people with extraordinary powers. This new race is called Mu. Hated and feared by the humans, the Mu dream of a place to live in peace: Earth—a mystical far away planet—for humanity had to leave their home long ago as pollution and destruction increased and made it impossible to stay there any longer. Jomy is a boy excitedly awaiting his birthday, the day he will enter the world of adults. Yet he knows nothing about the unknown powers sleeping in him and the shared dream of returning to Earth one day.

It is the year 2104 AD. The terrible war is over and peace seemed close in the world. However, there is one thing that can bring down this peace. That is the criminal organisation who's power and actions are widespread across the world... The Black Orchid. From the main countries of the world, the "Storm Force" was formed to take down the Black Orchid. They are also known under the code name "Fire Storm". (Source: AniDB)

Chirico visits an oasis town and meets Gotho and his friends for the first time in 32 years.