For example, the 21st volume of manga creator Hajime Isayama’s Attack on Titan goes on sale this Friday in Japan, Somehow, Twitter user @Mave_cham got a sneak peek at the book’s wraparound and shared a photo of it, which officially announces the starting month for the second season of the Attack on Titan anime!
In Japan, collected volumes of manga often come with an additional narrow paper wraparound that fits over the book’s cover and contains extra promotional information about the franchise and related products.
You could take the negative view of things and chalk this up as just another example of Japan’s overexuberant packaging culture, but sometimes they really do contain extremely exciting news.