“Would you like to live like Estella, not Astin?” Estella is the heiress of the Arthur family. Each generation of this family has a talent for mastering the sword. After the death of her father, Estella, disguised as a man, passed the exam and became a knight. She tries in every possible way to hide that she is a woman, but one day the crown prince himself makes a kind of proposal to the heroine. Will she agree?