re:Zero Ex, Vol. 2 (light novel)

"The bestselling series from author Tappei Nagatsuki continues in this spin-off where some of your favorite characters capture the spotlight! Long ago, in the kingdom of Lugunica, there was a great war between the royal military forces and the demihumans. A hero was born on that battlefield--the Sword Demon, Wilhelm Trias. This is the story of that legendary swordsman--and the woman he loved."