あらゆるルートで没落か死が待ち受ける悪役令嬢の姉ジゼル。前世の記憶を思い出した彼女は、すべての元凶である妹オディールの“悪役令嬢化”を防ぐため、再教育に取り掛かる！
さらにジゼルの未来の婚約者も、闇落ちルート確定の厄介な男で…！？ 穏便な暮らしを目指すジゼルの奮闘が始まる──！
Giselle, the older sister of a villainess, faces downfall or death on every route. After remembering her memories from her past life, she begins re-educating her younger sister Odile, who is the source of all evil, to prevent her from becoming a villainess! What’s more, Giselle’s future fiancé is also a troublesome man who is certain to fall into the dark side…!? Giselle’s struggle to live a peaceful life begins.
