Ken to Honoo no Diazfeld

is a Japanese light novel series written by Kei Sato, with illustrations by PALOW. The series began publication on October 10, 2016 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
At the western end of the continent, a region called Diasfeld was suddenly invaded by the superpower Alkyran. The attacked kingdom of Ianmad offered his brother, Prince Rustat, as a hostage in exchange for a consensus.

The remaining younger brother, Prince Leome, is a master of swords, but a weak man with a reputation for being loose. He vows to protect the country until his brother returns, but the exhausted kingdom is targeted by neighboring countries, and the assassination of his father and the rebellion of his old vassals are threatening one after another. Can Leome really protect the kingdom?

On the other hand, the born hero Rustat is steadily increasing his fame with his sword, courage and immortal body, even if he is in the enemy territory.

A fantasy war record with swords and flames flying around, opening!