UQ Holder! manga volume 18 features story and art by Ken Akamatsu.

After viewing Chachazero’s memories, Tōta learns more about Negi Springfield and Evangeline’s mysterious pasts, as well as their efforts to defeat the seemingly indestructible Ialda Baoth. Determined to save the world now more than ever, Tōta resumes his training with Kurōmaru—and the two soon discover that they must enter a special contract in order to obtain the power they seek. But with Kurōmaru’s conflicting feelings for Tōta only growing stronger, he soon finds himself at an impasse that could jeopardize their friendship forever…