I Have a Magical Pocket in the End of the World

She stared at the world that appeared in front of her, as if it were virtual, visible but intangible. People with big hearts watched with relish how the heroines in the world survived step by step in the apocalypse, and how they captured people's hearts one by one, starting the harem mode. She never expected that she would actually travel through time, and even travel to a passerby who met a miserable end. She thought that God would also give her a golden finger. When she took out a toothbrush with a brush head full of steel needles from her pocket, she knew that God would never favor her. By the way, villain boss, why are you always staring at me if you don't hang around the heroine? And the male protagonist, go coax your little wife, don't you see that the female protagonist is about to turn dark? I just want to be a salted fish, why is it so difficult?