After being run over by a truck and being offered the chance to be reincarnated in a parallel world, Misato Akihara, who felt unhappy in life due to her high intellect, asks that she be reincarnated with average abilities. Reborn as a noble named Adele von Ascham, the girl, going under the alias "Mile", travels to the capital of Tis to start an average life. Learning that several children have gone missing, Mile goes to search for them, encountering Mavis von Austien the knight, and Reina the mage, on the way. Finding the missing children along with a merchant named Pauline, the girls confront the kidnappers and their leader, Arledy...