Condemned Villainess Goes Back In Time GN Vol 04
Claudia, the daughter of a duke, is engaged to the crown prince. That is, until her half-sister Fermina sells her to a brothel, where she dies from illness. To her great surprise, however, Claudia awakens to discover she has gone back in time, back to her childhood body! Armed with a second chance, Claudia must use every wily trick she learned at the brothel to gather allies and keep history from repeating itself.