In many stories, there's always a stunning female side character. She's either so perfect that she's aloof and boring, or she's spoiled, willful, jealous, greedy, and vain.
Though she begins as the male lead's unattainable first love, she always ends up serving as a foil to the female lead's sweet, kind nature and as a pawn in the couple's romantic games. In the end, everyone hates her, and she gets a miserable, forgettable fate.
Then one day, these gorgeous women wake up.
Their response: There are plenty of men out there. You can have him. What's there to fight over?
Don't you know a beauty's motto is "you snooze, you lose"? She can find someone better than the male lead in no time.
Bye, then. The next one's even sweeter.
A beautiful woman will only suffer for money. She'll never suffer for love.
But those scumbags regret it. Their faces turn ashen, their eyes redden as if about to drip blood, and they go nearly insane.
World One: In a period novel, the male lead makes a meteoric rise and decides he deserves someone better. The gentle beauty immediately snags the powerful man he can only dream of.
World Two: In a sci-fi novel, the gloomy, insecure male lead raises hell, so the noble beauty decides to accept her family's arranged marriage.
World Three: In a lost-memory novel, the male lead vanishes for years, then returns with his lifesaving benefactor, now his girlfriend. The spoiled beauty falls in love with his older brother after spending so much time with him.
World Four: In a master-disciple story, the master refuses to admit his feelings for the beauty and keeps torturing her emotionally. As he wishes, she gives up on their relationship and sees him only as her master.
World Five: The male lead mocks the vain beauty, telling her that if she's so capable, she should go seduce his uncle. She really does become his aunt by marriage.
World Six: The groom runs away from the wedding, so the beauty marries his younger brother on the spot.
Theme: Love yourself first.