The Dream Design Book ( "Dorimu Disain Buku") is one of the items in Nebula Aikatsu! they was given by Miku in the episode 01 for the main characters.
Its a book with decoration on it (vary with the character) with a belt at the middle with a decoration the color of the book change with the type of the character:
- Dark Blue-Elegant
With the Dream Coffret Palette they choose a color and a make-up stylus and draw the clothe they choose to make they take the paper with the draw on it and analyse it on the Dream Analyse Card Set Bag to transform it into Aikatsu Cards.