Moto Ansatsusha Tensei Shite Kizoku no Reijou ni Narimashita

The story is about Serena a former assassin who was reincarnated as a dukes daughter after failing her mission She initially thought that pretending to be a noble would be easy but she struggled with the gap in perception between herself and her mother who had a flighty personality and her stepsister who deceived those around her in an attempt to push Serena out of the picture
Despite skillfully dodging the harassment she faced at the tea parties full of rivalry and navigating the complex social life of a school embroiled in love and hate Serenas cold demeanor resulted in her being ostracized and isolated One day she discovers that her stepsister is engaged to the second prince which leads her to run away from home However it is at this point that the first prince Evan appears in front of her
Follow Serena a former assassin who knows nothing of love as she charges forward into the aristocratic society of another world in this comedic occasionally romantic tale