Once, by her own strength, she defeated the Demon Lord and came to reign as the new Demon Lord.

The protagonist, a former village-born sister, was recognized as a noble lord and entrepreneur who contributed to the kingdom.

Surrounded daily by fine wine and lavish feasts, she lived happily as a wealthy hero.

One day, after several years, she was invited by the first prince, “Dalt,” upon his return to the royal palace, and went to a small castle…