Invaders of the Rokujouma!? Collector's Edition 9Paperback, 23 November 2021

Contains Volumes 24-27!
With Forthorthe on the verge of civil war like it hasn't seen for thousands of years, Elfaria and the others do what they can to regain the citizens' trust. But with Vandarion plotting against them, it looks a bloody battle is unavoidable.
Clan makes an interesting discovery about the true nature of Signaltin, but it's not all good news. Koutarou and the others find themselves in a difficult situation, but a strange message and a tentative new alliance may be just what they need.
Koutarou is ready to bring the full weight of the Forthorthian army down on Vandarion and put an end to the war once and for all with a little help from his friends. Nothing, however, will prepare them for the dirty tricks Vandarion has in store.
Nana needs some special maintenance; Shizuka, Alunaya, Ruth, and Kiriha go on a weekend getaway; Sanae and Theia get the others involved in an eating contest; and Yurika fails a grade?! Welcome back to Earth!