*“We were happy until that fateful day.”* Born into a clan of apothecaries, Olive is a young girl who dreams of continuing her family’s legacy. But then, one day, her hometown gets attacked. She loses her entire family, except for her older sister. They get adopted by the lord of the domain, Earl Elvert, only to be treated like livestock. Olive does everything to protect her physically disabled sister, who’s eventually taken hostage in order to coerce Olive to abuse her power. *“It's because only your family can make a ‘perfect poison’ causing instant death.”* That is, an ability to refine a special kind of poison from her blood. Olive is forced to assume a false identity, marry and later poison the infamous ""Murderous Duke."" However, contrary to the rumors, Duke Victor seems to be an honest and kindhearted man... *“I don’t want to kill him. But as things stand, my sister...”* The more love she feels from Victor, the more her anguish grows. (Source: POCKET COMICS)

"Be my attendant." What? A lame woman like me can't serve a man in that way! I was a plain, unfeminine woman, but before I knew it, I woke up in the world of the game I was playing! And to think that I'd become the villainous young lady Alissa, a character I hate the most... On top of that, Alissa is on the verge of being sent to a dirty old man as a prostitute by her evil sister, the queen, under the guise of being a saintess! As Alissa tries to escape from the royal palace, a wild and mysterious handsome man assists her rescue. But the forceful man orders her to perform serve him in exchange for his help! (Source: BisouBisou Comics)

https://www.cmoa.jp/title/304588/