This book is a comprehensive manga, including Kiki and Yamato from Demon Survivor, Jack and Gren from Pandora Hearts, and Solomon from Count D and the Prince of Demons, 1VS1, grabbing people from time to time, and the first volume is BOSS in Pandora Hearts. The second volume is about the fool testing summoned beasts.
Copy below:
Kuze Hibiki was very unlucky enough to be swallowed by a candy. He was still Kuze Hibiki, but he became a boss, and he became the highest manager of the Central Space Zone.
The boss has always been the embodiment of good and evil. The boss is usually the most unpopular person. Now, the whole world is looking for the boss.
If possible... Kuze Kyouki's inner thoughts: I would rather let Yamato be destroyed than be this boss again. None of the work the boss does is done by humans.