Arbacks (1) A

is the first volume of the Arbacks light novel series, written by Satoru Akahori and Illustrated by Aoi Nanase and Asako Nishida. It was released under the Dengeki Bunko Imprint in January 2000.

Synopsis
A mysterious world where magic is shot with a gun. A boy who lost his memory wanders in a harsh environment dominated by the rules of weak meat and strong food. In a town where he arrived without knowing his identity, he caused a panic! What a legendary villain Arbucks and two melons! He was chased without knowing why, was taken to a sheriff, and a beautiful girl Shot by Lonely, executed, and rescued by two beautiful girls ... The boy's heart is on the verge of collapse due to non-stop trouble. Will the magic gun "Rex" released with the help of Ya and Charm break through the strict enclosure !? Satoru Akahori's latest novel, Western Fantasy, which heralds the beginning of 2000.

(source: Amazon JP - Translated)