[Revision pending]
Mi Yao got herself into trouble in her own world. While she was being hunted, a little thing calling itself the Unrequited Love Side Character's Destiny-Changing System found her and asked her to follow it to various small worlds to complete missions.
Mi Yao scoffed. What was this nonsense? She was a succubus, for goodness' sake.
Still, being able to transmigrate freely between worlds and use human identities? That sounded pretty good.
Mi Yao took everything she could get, casually erased the System's "consciousness," and made it work for her.
From then on, countless cannon-fodder side characters disappeared from the world, and a succubus who "did whatever she pleased" took their place.
World One: The lovesick side character with a crush on the school heartthrob
World Two: The childhood-friend side character with a crush on her childhood sweetheart
World Three: The obedient girl with a crush on her adoptive brother
World Four: The delicate side character with a crush on her master
World Five: To be decided
PS: A simple, sweet story. One-on-one romance. The male lead is not split into multiple versions.
Theme: Loving yourself matters most.