Bluesteel Blasphemer: Volume 4

In Yukinari’s town of Friedland, a resident suddenly dies a mysterious death. At first, it’s thought to be a murder related to the recent battle... until people find out that there was an eyewitness. Yukinari decides to handle the investigation himself, only to find the words “Amano Yukinari” scrawled in Japanese at the scene… It’s the stunning final volume of the alternate-world battle-action series, Bluesteel Blasphemer!

[From J-Novel Club]