Zatch Bell!! Gaiden: Friend

After a series of bizarre incidents in his school, student Kometaki Okaka decided to investigate the cause of it. What he discovers will turn his world upside down.

Every 1000 years, 100 demon children are sent to Earth to compete in a battle to become king of the Demon World. Each demon is paired with a human partner who is given a spell book of a specific color. The human can cast the demon's spells through their book. If a demon's book is burned, they disappear and return to the Demon World. The last demon remaining becomes the king. The show is oriented around Gash Bell and his human partner, Takamine Kiyomaro. --- - **Won the 48th Shogakukan Manga Award for Shonen**

Oneshot from "Raiku Makoto" festival, a series of manga works running in lots of different magazines through the months of September and October 2009.

Chao, a wheelchair-bound little boy, is excited to be finally going to school to make friends with people his own age! But when he gets to his homeroom, the weirdness begins. Reality is warped and the children slowly realize that their teacher is a monster in disguise. This monster teacher is capable of inflicting a horrible punishment on students that are unable to answer his question about punctuation. Will any of the students be able to discover the answer before it is too late?

The story in this one-shot takes place sometime after the original ending, and focuses on Gash's feelings towards his current life as the Demon​ King, and also on his deep bond with Kiyomaro. It was made to commemorate the 10th-anniversary reprint of the Konjiki no Gash!! manga in a smaller format (bunkouban) with more chapters per volume than the regular tankoubon.

The Sunday Official Guide, which includes previously undisclosed information for the first time, a fun column, and the mysteries of Zatch Bell revealed by the mangaka.