This is a bonus set for volumes 3, 4, 5, and 6 of "Minikui Yuukaku no Ko." Volume 5 has two cards. All are illustration cards, and the backs are blank. The bonus card in the upper left is made of slightly softer paper. They are currently stored in a file. When packing, they will be stacked in a set of 5 and packaged in an OPP bag without individual wrapping. I didn't see any noticeable stains or dirt, but this is a casual inspection. There is a stain on the back of one of the bonus cards (see the second image, the upper left bonus card). Please refrain from purchasing if you are concerned. Please read my profile before purchasing (*^^*) Minikui Yuukaku no Ko Comic Manga Bonus Miraiya Shoten Shosen Postcard Illustration Card