The World's Least Interesting Master Swordsman: Volume 4 by Rokurou Akashi

With the peace treaty with the Domino Republic in place, Lain's safety is all but assured, but life in the mortal world is one new conflict after another.

A new challenger seeking to be the world's strongest appears: the mystery girl, Ran. This talented wild child has a more complicated history than anyone would ever have expected.

Does might truly make right? Conflicting values collide and fates intertwine in this new chapter of a tale that explores the meaning of strength.