An adult coloring book of line drawings by illustrator Toaru Ocha. It is the third coloring book made by Orion, an art supply maker.
The 10 line drawings are printed on Acrylic Deneb, Orion's watercolor paper (300 g, 0.45 mm thick). The sheets are A4 size (297 x 210 mm), the same size as the original drawings, and are glued along one edge.
The paper suits watercolor, acrylic paint, markers and colored pencils. Because the pictures are the same size as the originals, finished pages can also be put on display.
Translated from the Japanese original.