Each birthday is once in a lifetime, go on a miraculous adventure!

The latest work of Japan's leading animation director, Keniichi Hara— That is, "birthday", a miracle story that happens to everyone. With the character designs of Ilya Kuvshinov, an up-and-coming Russian-born artist full of respect for Japanese culture specially chosen by director Hara, the protagonist is played by voice actress Matsuoka Mayuu, known for among other things "Shoplifters". The most wonderful birthday entertainment that will make your life happy, and that you'll never forget has been born!

On the day before her birthday, Akane, a girl lacking in self-confidence, ends up forcibly taken to "Full-of-Color Wonderland" which is connected to an underground door of an antique shop. She is wanted to protect the colors that are disappearing from this world. How will Akane, made into a savior, determine to change her life in this great adventure?