The Enraged Lady Vowed Revenge (Buchigire Reijou wa Houfuku wo Chikaimashita. -Madosho no Chikara de Sokoku wo Tataki Tsubushimasu-) 1 (Hobby Japan Comics)

[Machine Translation] To the people of my country who betrayed me, are you ready for this? Elisabeth, a duchess, is told at a party that her engagement has been broken off by the crown prince, who has moved on to another duchess. She is imprisoned in jail for wrongful iniquity, and discovers that she has been betrayed by the country to which she has devoted everything. ...... Elisabeth finally reaches the end of her patience and decides to go into exile, taking a grimoire that holds powerful powers in its hands! She begins a new life and business in a new land with the help of Lucas, a viscount from a neighboring country. With a fierce desire for revenge against her homeland, she begins a new life and business in a new land... The beautiful duchess, who was "out of wedlock" and "imprisoned", uses her powerful grimoire to manipulate her "connections, economy, and military power" to take on her betrayer in an exhilarating three-way battle.

私を裏切った祖国の皆さま、覚悟はよろしくて？他の令嬢に心を移した王太子から、パーティーで婚約破棄を告げられた公爵令嬢・エリザベート。そのまま不当な咎で牢屋に幽閉されてしまい、すべてを捧げてきた国からも裏切られたことを知る……。ついに我慢も限界に達したエリザベートは、強力な力を秘めた魔導書を手に、亡命を決意!!　隣国の子爵・ルーカスの手を借りて新たな地で新生活＆商売を始める。祖国への凄烈な復讐心を胸に秘めながら――。『婚約破棄』×『投獄』された美しき公爵令嬢が、最強の魔導書を手に『人脈・経済・武力』を操って裏切者に爽快ざまぁ三昧！！！！！