Sweet in Public, Wild in Private: I'm the Best at Winning Over Heartthrobs

[Quick transmigration + harem rivalry + irresistible charmer + otome-style + actress heroine + fragments + exes chasing after her] [Every dog gets its own leash] After dying suddenly, Meng Xinxin transmigrates. She knows the drill: she'll have a System and a golden finger, then rise to the top! Wait, can someone explain why everyone else transmigrates as the heroine, while she's the cannon-fodder supporting female character? And on top of that, she has to travel through multiple worlds, win over fragments of the male leads, and become everyone's dream girl?! World One: She transmigrates as the true heiress of a wealthy family, face-slaps the fake heiress, and becomes the beloved girl of the campus heartthrobs. World Two: After transmigrating as the noble, aloof beauty's lovesick doormat, she stops pretending. The powerful man who rules the social scene begs her for forgiveness with red-rimmed eyes, while the aloof beauty willingly falls from grace. World Three: She transmigrates as a stand-in for a CEO's beloved first love. The powerful men who once looked down on her all enter the “chasing your wife to the crematorium” stage. World Four: She transmigrates as a powerless little maid serving the emperor. The emperor and his ministers all flock to her. … A cold CEO, business tycoons, a mad emperor, a loyal puppy, a gentle homemaker… Looking at all these different men, the scheming, spoiled Meng Xinxin stops pretending: “Cannon fodder? Supporting female character? I can work with that.” (The order of the worlds in the main story differs from the order in the synopsis and may vary. You can vote for the worlds you like best.)