Nowadays, whenever we want to access to the vast wealth of knowledge humanity has amassed, all we have to do check Google, Wikipedia, or the RocketNews24 search box. But long ago, you had to go to a place called a library.
With an Internet search engine you can just type in what you’re looking for, but simply scrawling, say, “history of feudal Japan” on the wall of the library will not only fail to provide you with the information you seek, it’ll probably get you thrown out of the building. Instead, you’ve got to utilize a system of numbers used to organize written works. While the U.S. has the Dewey Decimal and Library of Congress Classifications, Japan has its own framework, called the Nippon Decimal Classification.
For modern youths, though, having to look up books by a numeric code feels extremely cumbersome and inefficient. So how do you get young readers excited about using the Nippon Decimal Classification? By anthropomorphizing it as a team of cute anime characters. , of course!