The legend of the seven heroes

Yukia Shiori, a banal 14-year-old girl gives up her otaku life to repent to Christianity after a year in the world of sins. She was chosen to become a Mew mew, a warrior of God to fight the satanists and the demons who have taken control of the world for centuries and to repropopulate the words of the holy bible. It didn't all seem easy at first for her.