Shoko lives with her ordinary husband and student son. However, she has a secret that she can't tell her family: it's the desire to be 'brutally raped.' Today, as usual, after her husband and son left, she imagined being brutally raped while masturbating. But coincidentally, her son returned home early and saw her doing it. 'Mom, so you have this kind of hobby. I'll keep it a secret from Dad, but in exchange...' her son began to say…
