Giovanni is a young boy who lives on the outskirts of a small rustic village. His mother is bedridden and his father has not returned home since leaving to work on a fishing boat. An outcast at school, Giovanni has only one friend: Campanella, the mayor's son. During the town's Festival of Stars, Giovanni starts to daydream atop a hill and looks up to find a steam engine train floating in the air. He boards the train only to find his friend Campanella already there. And so, the two begin their journey through the stars where they come across unusual people and visit many beautiful and haunting places.

The characters from previous .hack//G.U. Games and .hack//Roots receive an email from Ovan. He is requesting them to go to Hidden Forbidden Festival where is set up a mysterious summer festival. There they find an AIDA Chim Chim who wishes to peacefully co-exist with the other players of The World. It then transforms into the word "Returner", so they assume it to mean that Ovan will return to The World.

Gongitsune is a famous Japanese children's story about the life of a little fox called Gon. The story is considered the masterpiece of Nankichi Niimi, also sometimes known as the Hans Christian Andersen of Japan. Gon is a little fox. Looking for food he comes to a little village where he repeatedly steals food and creates other mischief, constantly evading the angry villagers.

Li Yao, a genius craftsman, has been unable to break through the bottleneck due to the low development of his psychic powers, and then he obtained 40,000 years of cultivation by chance. Knowledge, thus opened up, but still missed the joint entrance examination. With the encouragement of friends and mentors, relying on his willpower to regain the opportunity to participate in the joint entrance examination, he finally entered the university of his choice and entered the story of realizing his dream of becoming a craftsman.