Within an old-fashioned town, much like the Meiji and Taisho Era, there exists a giant globe that floats in midair. This is the ‘ship’ called ‘Norn’. The inside is set like a small town with parks, etc.
The story takes place a little in the future. Guided by one particular song, young elementary kid, Suzuhara Sorata is warped through a time skip to an unfamiliar place much like the Meiji and Taisho eras from his textbooks. In this world, he meets 3 young ladies and 9 young men, and joins them on a journey aboard the mysterious ‘Norn’ ship in the sky.
[Source: Visual novel synopsis via VNDB]