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?
| Actor | Role |
|---|---|
 Takahiro SakuraiKiyomaro Takamine (voice) | Kiyomaro Takamine (voice) |
 Ai MaedaMegumi Oumi (voice) | Megumi Oumi (voice) |
 Akiko YajimaKotoha (voice) | Kotoha (voice) |
 Toshiyuki MorikawaWiseman (voice) | Wiseman (voice) |
 Ikue OtaniGash Bell (voice) | Gash Bell (voice) |
 Rie KugimiyaTia (voice) | Tia (voice) |
 Masami KikuchiKanchome (voice) | Kanchome (voice) |
 Hiroki TakahashiParco Folgore (voice) | Parco Folgore (voice) |
 Satomi KorogiUmagon (voice) | Umagon (voice) |
 Hozumi GodaKafka Sunbeam (voice) | Kafka Sunbeam (voice) |
 Tomoko AkiyaSuzume Mizuno (voice) | Suzume Mizuno (voice) |
| SShihomi MizowakiNaomi (voice) | Naomi (voice) |
 Tomo SaekiAkatsuki (voice) | Akatsuki (voice) |
 Koichi TochikaSakurada (voice) | Sakurada (voice) |
 Shigeru ChibaMoppun (voice) | Moppun (voice) |
| MMakoto RaikuArt Teacher (voice) | Art Teacher (voice) |