Yuki Fukuda, a 55-year-old former art teacher at a prestigious high school, is overwhelmed by her busy work life and a cold, distant relationship with her husband. She repeatedly engages in affairs with younger men. As her trysts continue, the demands from her young lovers grow increasingly extreme. Though initially confused by the humiliating outdoor commands, Yuki's masochistic nature blossoms day by day. She experiences pleasure even as she's violated by strangers and drenched in urine, her former image as a beautiful, respected teacher completely erased. She has become nothing more than a beast of burden, descending into the role of a mere cumdump and sex slave.