While the battle to determine the next king of the demon realm has often been fraught, the rules were always clear. 100 demon children partnered with 100 humans would challenge each other, using 100 magical books. What none of them knew was that there was a 101st magical book, powerful enough to stop any of the others. Gash and Kiyomaro must begin a journey that will take them into the demon realm to confront the mysteries of Gash's past. But will they escape in time to help their friends in a battle with a seemingly unstoppable enemy?
| Directing | Junji Shimizu | Director |
| Writing | Hiroshi Hashimoto | Screenplay |
| Visual Effects | Michinori Chiba | Key Animation |
| Visual Effects | Naotoshi Shida | Key Animation |
| Visual Effects | Hideki Hashimoto | Animation Director |
| Visual Effects | Keisuke Watabe | Animation Director |