Quick Transmigration: Utterly Mad

Simple version: This is a sad story, about a girl. Your mission is to conquer Mary Sue and Tom Sue in the sea of stars, so do your best! Serious version: The girl is forced to bind herself to System BG3888. From then on, she travels to different worlds to win over Mary Sues and Tom Sues, all to purge the demons inside them and save a world that's falling further and further into ruin. Dark version: The girl finally completes her mission and returns home. But when she opens the door, a dazzling rainbow light fills her vision. Help, Mom! There are so many monsters! Everyone just smiles and says, "Welcome home, our love." Do your best, girl!!! (These are the planned worlds, though I might change them QAQ: school → brothel → apocalypse → harem hero → women-ruling world → System → general → divine realm.) Extra! This story has no chapters written in advance, and I type slowly, so I hope you'll forgive me for not updating daily.