On 9 December 2025, Sanrio Puroland (Tama City, Tokyo; "Puroland"), a fully indoor theme park operated by Sanrio Entertainment Co., Ltd. (headquarters: Tama City, Tokyo; President and CEO: Aya Komaki), celebrated its 35th anniversary on December 7, 2025, and debuted its new main parade, The Quest of Wonders Parade. The story begins with Hello Kitty finding a mythical book about a "treasure that brings eternal happiness." Cinnamoroll, Pompompurin, Kuromi, and their friends set off on a delightful adventure in search of this "treasure of happiness."