Fantasia is based on the imaginative and fantastical elements of the Neverending Story. It takes inspiration from the story's rich world-building and magical concepts.
I'm not entirely sure as I haven't read it in detail. But generally, it might be a novel that involves a harem theme, perhaps set in a unique or fantastical world. Maybe it has a male protagonist surrounded by multiple female characters with various relationships and adventures.
Fantasia: The Silkworm's Complete Works and the simulator were currently not officially authorized. Due to copyright issues, many novel websites would not provide free downloads of the complete works. If you want to read the novel " Heavenly Silkworm Transformation ", you are recommended to buy the legal book from the official website or authorized bookstore. In addition, if you want to use an simulator to read a novel, it is recommended to choose an simulator that supports the novel and ensure that the simulator is compatible with the format of the novel you are reading.
The Fantasia Barrino story could be available on dedicated movie channels or through digital rentals on platforms like iTunes or Google Play. Do some exploring on these services to locate it.