A high school girl, Sayaka Kudō was the bottom of the class. After a year, she improved her deviation value from 30 to 70, then passed Keio University that is considered one of the most difficult to enter in Japan.
Set in the year 2020, following her supposed death, a young woman returns as the son of her noble family to precede the family's prestigious company, with a demon at her side to avenge her parent's murder.
