If you're looking for manga similar to The Simple Life of an Ex-Villainess (With a Fluffy Friend?!) (Light Novel), you might like these titles.
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....
Tsubaki is a young girl with a secret: she was born with memories of her past life as a twenty-something office clerk. A chance encounter with her bratty half-sister, Mio Kurahashi, when they're both four reveals a series of startling truths. Not only are they both reincarnations, but the world is an otome game and Mio's the protagonist! Furthermore, Tsubaki is destined to witness her mother's suicide, and inevitably become the game's tragicomic villainess who always dies in the end. Armed with this knowledge, Tsubaki vows to take destiny into her own hands, exploiting as many differences between the two worlds as she can in order to save her mother, the love interest, and herself.
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?
I, Cardinal Brauz, am a reincarnated person. How should I put it, I was reincarnated as a villainess, probably!! Due to an unexpected event, I had regained the memories of my former life. I was someone who immersed herself with light novels! What’s more, I also never played an otome game before! But, I probably have been reincarnated as a villainess? By the way, how should I carry myself as one? Anyway, for the sake of facing the destruction end, I will do whatever I can for the time being!
I was reincarnated as a villainess from an otome game I was playing. At this rate, I'll be exiled for being in the heroine’s way of conquering love. However, in this world… there are no entertainment materials! No doujinshis, no otome games, no smartphone! I'm really bored! Of course, I should be avoiding the destructive bad end… but before that I’m going to die from boredom! "If there's no entertainment, just create it!" Using the knowledge from my past life to create toys and romance novels, I'll make this boring world fun! After becoming the queen’s favorite entrepreneur, I thought this scenario change will bring me to my wonderful future… but now the novel I wrote has brought me to the destruction flag--!?
Hinase Kaede lost her life on her 15th birthday. However, her soul was thrown into Erika, the villainess of an otome game! To avoid the bad ending, she decides to not get close to the main characters of the game in order to avoid the bad end.
Oh dear, it seems I was reincarnated into a modern otome game from a fantasy world! All I ever wanted was to be free of my responsibilities as a countess and I finally got my wish when I was reborn as a commoner in modern Japan. Everything was going perfect, except it turns out this is the world of an otome game and some crazy girl who goes around calling herself the “heroine” is upset at me for stealing all her “events” with the “love interests”… Now she wants me to team up with her against the “villainess”. I'm supposedly just a random NPC, so why am I being dragged into this?!
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!