The only existence capable of dispelling the miasma that is rotting the world is the "Saint." Carol, who attends the academy as a candidate, worked hard in her training to protect people. However, what manifested during the Saint selection ritual was the "Power of Corrosion" that rots whatever it touches. To the people who turned from expectation to declaring her exile from the academy, claiming it was a cursed power, Carol replies――"I'm done with acting like a piece-of-shit noble lady." The tale of a "delinquent" Saint who doesn't believe in God, begins!