[ Deceive Diello Arzenta and steal his purity. ] This was the command of Duke Aloze, the vile father who tore his daughter’s back apart with the name of his enemy carved into her flesh. The protagonist reincarnated as Crua Aloze, a villainous extra in the R-19 tragic novel <The Three Dukes>. She is ordered to disguise herself as “Ferro,” Arzenta’s fake destined partner, and destroy his family. However, to escape the cruel fate set in the original story, she chooses to sleep with the enemy. “Let’s get married. Just for a year.” They enter a contract marriage for mutual benefit, pretending to be passionate newlyweds while she secretly works to protect Argenta. But after a year, when Crua plans to leave him, Diello finally reveals his true colors. “I thought you were wise, but why do you only know one thing… and not the other?” Can Crua ever escape from Diello’s sweet yet obsessive love?