If you're looking for manga similar to Akuyaku Reijou ni Narimashita. (Light Novel), you might like these titles.
Yukimura Rina is an overworked twenty-something systems engineer who’s dangerously close to her breaking point. Her only comfort is an otome game with a charming side character, the brother of the villainess, who soothes her weary heart. She gets so hooked that she forgoes sleep and ends up blacking out...only to wake up inside the game as the villainess, Ekaterina. She’s now the little sister of her favorite character! Her new brother Alexei is handsome, kind, and responsible—the whole package. Rina, now Ekaterina, would be happy just staying by his side, except for one little problem. If she allows the game to run its course, she and her brother are headed straight for a terrible future! Can Ekaterina overcome the doom flags that threaten her new family and the empire, while also preventing Alexei from working himself to death?
One evening in early spring, eight-year-old Erika Aurelia realizes she’s the detestable little villainess from an otome game called Liber Monstrorum: The Winter Maiden and the Phantasmic Beasts. As if that wasn’t bad enough already, Erika’s role in the game is to pester the main character... and then die in order to kick off a mysterious series of events! These incidents are different in each love interest’s route, and seven routes means seven deaths to avoid. Not one to throw in the towel, Erika knows she must take action to destroy her death flags—and since her life is on the line, there’s no time to lose!
After waking up as the villainess she admires so much from her favourite otome game, Alicia trains hard every day to become the greatest villainess of all time.
When I noticed, I was a Villainess, Follower B! Huh? Isn’t this the world of the game my daughter played before?! Suddenly, I, the Earl’s daughter Cosette regained my memories of a previous life and was appalled by my mildly fatty body type and started dieting. Using the skills I’ve cultivated continuously in my previous life as a old woman, today Cosette will push forward!
I reincarnated as the villainess in a game world— I’m not afraid of banishment, I’ll manage my territory and live as I like! I reincarnated as Celistina, the villainess of an otome game. As the fiancée of the crown prince, in this world where everyone is gifted with blessings by the gods and spirits, I’m the “young lady without a blessing.” As a result of being a fan of the game, I know that the crown prince will be with the heroine sooner or later, and he will break our engagement. Alternatively, if they don’t end up together, I will be executed…
Charlotte, who reincarnated as a villain girl in an otome game, started to avoid the death flag. The goal is to spread the sake that I loved in this world! However, the juice and holy water that I made for trial were all nonstandard...
The high school girl Manami who had fallen down the emergency stairs at school had, before she noticed, become a three year old in the world of an Otome Game. What’s more, that little girl was one of the rival characters that appeared in the game; the can’t-take-a-hint-burikko-type-rival daughter of a marquis family. What awaited her at the end was social obliteration. Though she did get a bad feeling about this… Manami decided not to worry! It was a dream after all, so that had nothing to do with her. For now, she’s going to master magic! Hooray!
After reincarnating, I found myself as the Villainess in an Otome game I often played in my past life, the world of “Love☆Magical”?! Although I reincarnated as the Villainess Isabella… having memories of my past life, if I let the scenario play out as it did in the game, I’d be going down the execution route…?! To free myself from the worst possible ending, my noble battle begins, however… Can this overly unusual Villainess rewrite the ruin route awaiting her...
I was reincarnated as Blanca, a villainess in the world of an otome game that I loved in my previous life. It's unfortunate that I was reincarnated as Blanca, a character I don't like very much, but maybe I can witness a flirtatious scene between the heroine and her capture target without being charged for money! In order to make the love of the captured target and heroine more exciting than the game, I will do my best to be mean to the heroine, but for some reason the love doesn't seem to be progressing....