Frieren: Beyond Journey's End. Volume 10: Kanehito Yamada

The adventure is over but life goes on for an elf mage just beginning to learn what living is all about.
Elf mage Frieren and her courageous fellow adventurers have defeated the Demon King and brought peace to the land. But Frieren will long outlive the rest of her former party. How will she come to understand what life means to the people around her?
Years before the end of the war against the Demon King, Macht, the most powerful of the Seven Sages of Destruction, made a deal with the lord of the fortress city of Weise in an attempt to understand human emotions. Although the deal was at first beneficial to both sides, Macht eventually transformed the entire city and all of its residents into gold. Now, the strange tale of Macht, the fate of Weise, and Denken`s own past will all lead Frieren and her companions to one of their most difficult confrontations yet.