Quick Transmigration: The Yandere Villain Boss Strikes First

They said she was pure-hearted, weak-willed, and harmless—perfect for nurturing. They were catastrophically wrong. One day after binding with her system, the host vanishes, returning with blood-stained hands and a chilling smile. "Where did you go playing?" the terrified system squeaks. Playing? Oh yes, just playing. Now she's hopping between worlds, not to save them, but to claim the most dangerous villain bosses for herself. Each universe, a new obsession. Each target, utterly unprepared for a protagonist more unhinged than any antagonist.