This is a set of 4 special rare stickers from the Seal Retsuden "Demon Slayer" series. - Characters: Tanjiro Kamado, Kyojuro Rengoku, Nezuko Kamado, Zenitsu Agatsuma - Numbers: SR01, SR03, SR07, SR16 I purchased these and have kept them in a case immediately after opening them, so they are in near-mint condition. Also, neither I nor my family smoke. We also do not have any pets. Thank you very much.