This product is a "BT21 KOYA CHIMMY B5 A5 Notebook 4-Book Set". It is brand new and unused. This product is a set of 4 notebooks. Individual sales are not possible ( * . .)" 2 A5 notebooks (Koya and Chimmy) 2 B5 notebooks (both with the same design, featuring all BT21 characters) These are school notebooks, so you can write your class schedule, etc.☺︎︎ Please refrain from purchasing if you are sensitive to items stored at home. If you have any questions about the product or would like additional product images, please feel free to ask.