Futanari Onna Kaito Natalia ~Hakubi o Yogosu Sakusei no Wana~ (RJ01649324)

The protagonist, Natalia, is a mysterious and elusive female thief who has been operating in the shadows of the great nation of Raslan, the setting of the story, for several years.
Using her own unique network of information, she sends予告状 (advance notices) to corrupt nobles who have escaped the law and to the hideouts of bandits living in remote areas, stealing treasures despite tight security.
Due to her otherworldly exploits and stunning beauty, she is known as the “White-Haired Phantom Thief” despite being a wanted fugitive, and is celebrated as a dark hero among the good-natured people.
However, in a timeline slightly before the main story, she falls into a trap while sneaking into a place and is cursed to become a hermaphrodite.
Although she survives unharmed except for the curse, the hermaphrodite curse is powerful and cannot be easily broken. Natalia, a narcissistic woman with strong convictions, cannot accept having ugly male genitalia on her body, and returns to her life as a thief in search of an item to break the curse. The target she chose was the mansion of Irene, a merchant with a dark reputation.
Irene’s mansion, belonging to a mere middle-class merchant in the countryside, should have been an easy target for Natalia, a genius phantom thief.
Natalia, with a confident smile, sneaked into the mansion, unaware that, due to a combination of various coincidences and ulterior motives, Irene’s mansion that day would become the greatest obstacle in Natalia’s life as a phantom thief.