White Noise
That night seemed to never end for poor Ruytaro, who was headed for the deepest rooms of the palace. Meanwhile, Yoichi felt a sick feeling in his chest, as if he sensed that his Sensei was in danger.
In a little over half an hour, even though sleep made his tired eyelids waver, the young tamer continued reading 'Fundamentals of Demon Taming', one of the books from the gatekeeper's private collection.
It gathered a lot of information regarding the most coveted and typical job in the world. Basic and advanced rules, explanations regarding demon types and their weaknesses, tips on where to find the rarest demons and how to tame them.
In particular, Yoichi's eyes read the same sentence more than once: "The types of demons so far recognized by the most experienced scholars in the capital are thirteen, and they are distributed rather unevenly throughout the underwater and emerged world."