Shijou Saikyou no Mamahaha ni Hyoui Shimashita

When Chitose opens her eyes, she discovers that she has been transported into the body of Claire, the infamous villainess of a novel known throughout history as its most terrifying woman. Forced into marriage with Duke Vermillion, a ruthless military commander feared as the Grim Reaper of the Battlefield, Claire was originally destined for execution. Overwhelmed by this sudden and perilous predicament, Chitose struggles to comprehend her new reality until she is unexpectedly approached by three adorable children. As someone who adores children and once dreamed of becoming a nursery school teacher, Chitose is overjoyed to meet these little ones, especially since they never appeared in the original story. However, her excitement is quickly dampened when she realizes the children are utterly terrified of the woman whose body she now inhabits. To make matters worse, her husband returns from war only to treat both Claire and his own children with complete indifference. Faced with a fractured household filled with fear and emotional distance, Chitose must use her genuine warmth and determination to mend this broken family before her predetermined doom catches up with her.