I Transmigrated into the Heroine's Evil Stepsister

Annie transmigrates into the cruel romance novel Angels of Nordvisa as the vicious stepsister who shares her name.

According to the original story, this family is about to be destroyed.

Her promising eldest brother, the heir to the count's title, is cold on the outside but kind at heart. He will be framed by an aide bribed by the eldest prince in the upcoming battle, leaving no body behind.

Her angelic, beautiful, and kind older sister will be bullied and framed by Scumbag No. 123, who is infatuated with her, and his followers. After enduring all the usual melodramatic angst-novel tropes, her family will be destroyed.

As for Annie, the vicious stepsister who is devoted to one of those scumbags, she will bully her stepsister with all her might, then have her heart ripped out and die without a trace.

Annie: ...Thanks. My low blood pressure just turned into dangerously high intracranial pressure.

Annie instantly gets it:

I must have transmigrated here to save my handsome brother and beautiful sister from scumbags and awful people.

Looking at her brother and sister beside the bed, their faces giving nothing away even as they both keep an eye on her, Annie takes a deep breath:

A redemption arc? I'm in!

She takes her angelic sister's hand and says earnestly, "Sis, if you want to fall in love, I'll find someone for you. Anyone will do, but promise me you won't pick up men from the trash can."

Then she gives her eldest brother, who dies from the start in the original story, a book titled How to Guard Against Fire, Theft, and Your Aide: One Story a Day About a Hero Betrayed by His Aide.

Annie: "Bro, do you know what heroes and villains have in common? They both die because they talk too much... No, they die because someone stabs them in the back!"

After a long stretch of fighting alone, Annie decides to find herself a reliable partner.

She remembers the powerful figure from the original story who nearly crushed all three male leads, and says sincerely, "Sis, let's go join the Northern Grand Duke."

Her angelic sister is silent for a moment. "But doesn't everyone say he's a monster?"

"How could someone who's guarded the northern frontier for so many years be a monster? He's a hero, darling. Don't believe the rumors!"

"What if they turn out to be true?"

"Impossible!" Annie says firmly.

Later, Annie successfully becomes partners with the Northern Grand Duke.

The handsome man plants one foot on the male lead's back, his sword gleaming like snow as blood trickles down its blade.

"Annie, didn't you promise to take responsibility for me for the rest of my life?" He turns to her and smiles, breathtakingly beautiful.

That's right, the Northern Grand Duke really is a handsome man with an eight-pack.

And he's also the one hailed as the "last angel in the world"... her sister.

Annie: When it comes to reading a story, once you start, you really do have to read it to the end.

Theme: Even in another world, stand on your own two feet and be strong.