The Villainess Carries a Strategy Guide

The daughter of a Duke, Rebecca, is a “villainess” of a certain “maiden game” according to her late mother who was a “reincarnated person”.
Moreover, if the scenario goes according to plan, it seems that Rebecca will ruin the duke family…… Is it possible to lose to the “compulsion of the scenario” that took away my beloved mother!?
Rebecca, who entered the school where the game is set, struggles using the “strategy book” left behind by her mother!