Umm... This one, that one... Then there's this dictionary-like book left behind by that blue-dressed outsider...

There are some dangerous books that only a few people know of.

Eh!? What's this! It's clearly emanating a strange magical power!?

There are some clearly dangerous books mixed in, so is it alright for a human like you to be handling them?

Well... The truth is, I tend to get haunted by the youkai in those books... Some books have been sealed by Reimu-san, too.

...Is that so.