Isekai'd as a side character

After transmigrating into a novel, she becomes Hailey Torte, the personal maid to Jeremy Roshinante—a powerful, cursed noble destined to end the world. Determined to change her fate, Hailey plans to win Jeremy’s trust and dismantle the corrupt family controlling him. With only three months until the novel's plot begins, she faces perils all while striving to rewrite the story to ensure her own survival.
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I am Kim Geumja who is deeply immersed in the supporting character of a novel soon to face a miserable ending. One day, I was involved in a car accident. When I opened my eyes, I found myself inside of a novel that has a character I’m in love with.
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○ : basically sexual harassment, but played as comedic

I've been transmigrated to another world! As an extra chambermaid from a 19+ imperovished novel from the early 2000s!" For now, I'm trying my best not to upset the male lead's temper so I can survive and return home.
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A transmigrated Wang Yi is determined to act a villain in order to progress his mission and return to his own world. Unfortunately, the male lead can read minds.
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○ : child abuse; pseudo-incest

She was in possession of an “Extra 1”, who married the criminal and died in a violent manner.
I don’t think I need to get married. I proposed to another man, ran away from home, and did all sorts of other things. Five years of possession's life, three weeks before entering the original. The more I twist the original, the closer I get to the original.
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I became a maid in a book, and the family I served died after three years. Others who possessed people who ran wild were killed one after another by the protagonist and the villain no matter what. In order to survive, I became the dog of the villain and longed for the day to escape.
○ ("nameless extra" but she possibly was in the original with a minor role)

I reincarnated as Luna, a supporting character who is accused of ruining the heroine and hero’s relationship and is murdered.
I’m not interested in someone else’s man, but the heroine’s friends bully me every day.
“I don’t want someone like Fersen even if you beg me to take him so stop bothering me. I’d rather date Anthes Vincent, who’s rumored to be insane.”
But then I met someone I never expected to.
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I became an extra who died because of her rubbish fiancé, so I befriend the heroine in order to twist the original plot.
“I’m sorry, Ciel. But we’re still friends, right?”
Then the heroine has an affair with my fiancé.
Yeah, go ahead and take that trash…
“Would you like to have a relationship with someone who had an affair with my fiancée, Your Highness?”
…because I’ve decided to take the male lead.
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I reincarnated as the heiress of a powerful conglomerate family in a novel. The problem is, this world is about to be destroyed by monsters. With nothing but money to spare, I quickly bought a mansion in the countryside to build a shelter to escape the monsters, but the world ended far sooner than I had anticipated. On top of that, somehow, the male leads ended up trapped in my house with me, and these guys don’t seem to have any intention of leaving.
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