Nirvana of Rebirth

A nerd female intelligence agent travels to an imaginary ancient time, how to survive. Others travel through time and are miserable, but I just don't want to live. She runs around the streets with rare treasures. Others use them as treasures and I use them as pots and pans. Others travel through time to become beautiful women and dress up as men to go out for fun. Sister just wears an ugly face to get through life. What, no one will want me if I am too ugly? There are already a bunch of handsome guys behind my butt. If you don't believe me, I'll tell you one by one...