Adapted from Kashiwaba Yukiko's "A Strange Journey from the Basement": On the day before her birthday, the unconfident Akane is confronted by a mysterious great alchemist and his apprentice. They ask Akane to save their world, and without Akane's consent, they force her into another world, "a wonderland full of happy colors" through the door of the antique shop basement. In this world inhabited by incredible animals and people, colors disappear. What is Akane, who was chosen as the savior to protect the world, going to make a life-changing decision before the end of her great adventure? A special and wonderful birthday that only happens once in a lifetime is about to begin...!