The 4th volume of Her Royal Highness Seems to Be Angry.

To solve the mystery of the white-cloaked man and the black fog, Leticiel turns to Nirvaan's royal library for answers. There, she encounters a strange and sinister message in one of the library's books...

But before she can uncover more, Leticiel learns of a mass uprising within the Filiaregis duchy! Chaos is spreading throughout the region, and it's up to Leticiel to set things right.

Can Leticiel mete out justice before it's too late?