Re:Zero Kara Hajimeru Isekai Seikatsu - Kenki Koiuta

Vol.3 Chapter 14: Defending the Royal Castle
Vol.2 Chapter 13.5
Vol.2 Chapter 13.5
When a demon falls for an angel…    Long ago, a great war raged between the royal military forces of Lugnica and the demi-humans. 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.    ---