A mysterious entity called "Hyphen" suddenly appeared in front of Momoe and questioned her about life and death before doing something to Panic. And the same change to the Egg World has also arrived to Rika's dream. Meanwhile, unaware of what is happening to Momoe and Rika, Ai enters the mansion built in the underground garden. In a room full of documents, Ai encounters Ura-Acca, co-founder of Japan Plati and a former scientist, who tells her an old story.