Guns Heart

is a Japanese light novel series written by kazuyuki Takami, with illustrations by Kota Aoiro. The series began publication on January 10, 2004 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Khellin, who was the bad leader of the city, became a centurion by chance! However, the destination I courageously went to was a notorious unit that smoldered in the frontier, which was also rough. With his own vitality, Kerin struggles to reform his troops. Suddenly, a large number of beasts sprout and begin to attack neighboring villages. It was a sign of an unprecedented disaster.