Hollow Regalia Novel Volume 3 was written by Gakuto Mikumo with illustrations by Miyuu.

Iroha’s channel surpasses a million views overnight when a sleuth streamer called Yamadou exposes her as a dragon medium on his channel! Now it’s like the whole world is out to get her! Before Yahiro and the Galerie can do anything to retaliate, the Guild detains Yahiro...as a suspect for serial murders?! With Yahiro out of the way, a foe with an old grudge launches an attack on the Galerie’s Japanese branch. Iroha and her siblings are more vulnerable than ever!