Mochiron, Isharyou Seikyuu Itashimasu!

Cardinal, a researcher who loves light novels, had been reincarnated as the villainous daughter of an otome game. Her banishment flag is raised, but oblivious to the game's storyline, she doesn't know how to overcome or avoid it. She makes the critical decision to live on her own and become a villainess until the very end! She'll rise up in this unknown world embracing her new role.

Break my heart, pay the price. "I'm breaking up with you!" My fiancé suddenly declares that he's breaking off our engagement! Apparently, he's got a crush on the countess who just transferred to our school, so now he plans to set me up as a villain to end it between us. So be it! But he'll have to pay me a hefty settlement fee!

Altina who's fond of books starts pretending to be a mute in order to escape the imposed image of her as a "perfect lady" role that's set-up by her older brother and older sisters. However, that being said, that pretend act will soon be discovered by no other than the head librarian, sir Shijar himself?!