Have you ever wondered what happens to your cherished childhood items as you grow older? Whether it's your beloved teddy bear, the intricate model kit you spent hours assembling, the treasured picture book you read until the pages worn thin, or the glistening stone you discovered in the park - where do these precious mementos end up? This tale tells the story of mystical creatures who journey from another realm, stealthily collecting all of these forgotten trinkets that have been abandoned by their former owners as they transition into adulthood. These otherworldly beings go unnoticed by humans as they whisk these castaway treasures away to their own world, where they utilize the collection to construct a magical metropolis known as Oblivion Island.