I believe this was a novelty item given only to those who purchased goods at the official merchandise shop, "jealousix." It's a valuable item as it was from a shop that was open for a limited time, from July 1st to September 30th, 1991, the release date of the album "Jealousy." 35 years have passed, so I'm not sure if the sticker still functions, but how about adding it to your collection? ★ No pets, no smokers ★ Will be sent via regular mail (mini-letter). If you prefer anonymous shipping with compensation via Mercari, it will be an additional 100 yen. Please let me know before purchasing.