Or, well... making it fun to read isn't really the point, but...

Originally meant to give humans the knowledge to resist youkai, was it?

Yes. But with the rise of the Great Hakurei Barrier and the dueling rules, the world is peaceful.

Even the gap between humans and youkai has gotten a lot smaller.

Enough that you're showing a book about anti-youkai measures to a youkai in the middle of the day, huh?

Good grief.

I think this peace is wonderful, of course, but...