The story starts from a couple of weeks after "Sonic Dive". Layla and Sigma are admired by citizens and adventurers for what they achieved. They have a rest for a while at a small log house in a forest near the town. But their peaceful life doesn't last long.... Their town is attacked by monsters. Sigma beats the monsters with the sword to protect the forest, but Layla gets the poison and goes into a coma. Sigma decides to fight again to get back Layla's smile... [From [url=https://web.archive.org/web/20090106135643/http://www.erogeshop.com:80/product_info.php/cPath/146_49/products_id/1005714]Eroge Shop[/url]]

During nighttime, the terrain of the Earth is susceptible to inexplicable changes. Human beings called these strange occurrences the Phantom Phenomenon. Soon, with the power of technology and magic, they learned that threat is lurking in the depths of our planet. The underground city Ge-Pang was built to avert it. One day, a SOS alarm sounds in the city. Leila Reifido, who possesses the magical power of levitation as well as technological skills, sets out to counter an unprecedented robotic assault. [From [url=https://www.mobygames.com/game/sonic-princess]Mobygames[/url]]