I Possessed the Most Terrifying Stepmother in History!

One day, Chitose finds herself waking up to the realization that she is possessed by Claire, the antagonist from a novel, known as "the most terrifying woman in history"! Claire was compelled to marry Duke Vermillion, referred to as "the Grim Reaper of the Battlefield," and was fated for execution… Confused by her dangerous predicament, Chitose is unexpectedly faced with three cute children. Chitose, who has a fondness for kids and dreams of becoming a nursery school teacher, feels delighted to encounter children who were never mentioned in the novel, but the children appear to be frightened of Claire. Additionally, her husband, Duke Vermillion, who has just returned from the battlefield, shows apathy not only towards Claire but also to the children… Can Chitose heal this chilly and unapproachable family?!