Slow-witted, naturally wicked lead x gloomy, possessive wife-devotee, one-on-one romance
Bad people are meant to be thoroughly bullied!
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When Wan Ye saw the flyer, she thought, What if it's real? So she called the number and embarked on a road from which there was no return.
The System told her that her mission was to become a stepping stone for the protagonist. Only by being tempered on a stepping stone could the protagonist become stronger and more ruthless.
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[Modern world: An ordinary beta who cheats on her wife with countless partners]
Wan Ye is ordinary and conceited. She has an omega wife whom she married after saving her life, using that debt to get herself a beautiful omega wife. Unfortunately, the omega is cold all day, won't let her touch her, and can't even make money. Naturally, Wan Ye gets tired of her over time, so she starts flirting with people online and keeping a harem, using her omega wife's photos.
Wan Ye puts on a good act, waiting for her online flirts to realize the photos are fake and come beat her up together. Then they'll catch sight of the original owner's wife, beautiful as a celestial being, and the male and female protagonists will get together after a bit of back and forth.
That's right, her wife is the female lead, and one of the fish in her pond is the male lead.
As for Wan Ye, the scumbag, the male lead sends her off to mine in Africa early on.
Wan Ye wants that script. But in the original plot, one of her fish realizes during a video call that she's a beta and is disgusted by her. Instead, the fish says, "Baby, could you lower your neckline a little more? Your skin is so fair, baby. I love it. I really want to mark you, baby."
Her omega wife, who never once gave her the time of day, holds her feet at night and kisses them, lowering herself as far as she can. "Baby, people outside are bad. They'll take you away and lock you up in bed to bully you. Delete them, okay?"
[Beastfolk world: A drunken stepmother who covets her stepdaughter]
Wan Ye is a low-ranking cat beastfolk with a bad temper and a love of drinking. She's drunk all day long and often gives her high-ranking snake beastfolk stepdaughter lewd looks.
The stepdaughter has long known her stepmother has improper feelings for her, so she sets a trap to expose the stepmother's disgraceful behavior and get her sent to prison for sexual harassment.
Wan Ye plays her role with great dedication, spending all day red-faced and swearing, reeking of alcohol. What she doesn't expect is that while her mind is clouded by drink, her stepdaughter uses her snake tail to lift the hem of her clothes. Her eyes full of obsession, she says, "Auntie, don't you want me? Teach me what to do. I'll do it better than my mother."
[Apocalypse world: A coward who pushes her friend into a horde of zombies]
When the apocalypse arrives, Wan Ye's friend awakens a superpower, while she herself remains unchanged. Her friend even earns the favor of the base leader. Wan Ye is so jealous she could die. As she sees her friend becoming more and more outstanding, she comes up with a plan. During a mission, she deliberately pushes her friend into a horde of zombies.
Her friend goes missing, or rather, dies. When the base leader asks about it, Wan Ye says pitifully that her friend died protecting her.
Seeing the disgust in the base leader's and everyone else's eyes, Wan Ye thinks, This is in the bag. The protagonist's followers will definitely kill me in my room this time.
When someone knocks on the door, Wan Ye rushes over excitedly to open it. But the person standing outside is the protagonist, who was bitten to death by zombies.
Half the protagonist's body is exposed bone, and her face is horribly rotted. When she sees Wan Ye, she grins with a bloodied mouth. "Baby, you can't go looking for other women while I'm gone."
[Interstellar world: A sharp-tongued, penniless relative who shows up asking for handouts]
[Western fantasy world: A mixed-blood vampire who has been psychologically abusing her partner for years]
...Other worlds to be decided
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The protagonist's other selves vary from world to world, but there will always be an official partner. She'll only sleep with her official partner. None of the characters are blood-related. The protagonist is naturally wicked, and the story includes melodramatic, coercive romance.
Theme: People mustn't do bad things.