UQ Holder! manga volume 13 features story and art by Ken Akamatsu.

After being thrust into the past, and right into the middle of the days of his grandfather’s youth, Tōta comes face to face with the Mage of the Beginning! However, things are not all they appear to be—Tōta isn’t just in Negi’s memories, but a nightmare where Ialda reigns supreme. With the help of Yukihime, as well as Negi’s first partner Asuna Kagurazaka and the rest of UQ Holder, Tōta must save his grandfather and stop Ialda once and for all, or be pulled into darkness, along with the rest of the world.