Gun Princess

Luca Athrason has been sentenced with 500 years of imprisonment – such is the price to pay for his sins. The only way for him to shorten his sentence is to accomplish his missions as the Church’s vanguard or as some might call it... The Church's Dog!

A timid boy named Zao Ci, which was accepted by Mateliya, a Demon as her "number 2". He was always called an idiot by Mateliya. He is so weak that he could not even pull the trigger of his gun. But, who actually knows that he had a special power within him, which only Mateliya can control. This begins the adventure of the contract of the boy and his master to save others.