Stella was never given any love from her family or any skills given by God. When her sister loses the heart of her fiancé and she runs away to a monastery, Stella awakens to the joys of cleaning and becomes a maid to Cecil, a prince with a reason to stay in a room filled with a noxious gas! Before she knows it, she has acquired the skill of "purification" - a skill that, when combined with his "destruction" skill, transforms a magical beast into a fluffy holy beast! Stella, who possesses such saintly powers, has a secret about her origins...?