OL Stamping Expert
There are women called OLs in Japan. OL stands for Office Lady, one of many strange Japanese business terms. OLs is usually unmarried, living at home girls that due such tasks as serving tea and secretarial or clerical work. OLs are normally full-time but there is almost no room for promotion and it is expected that when they finally get married, that they will leave the job.
OLs are found in everything, from movies to hentai. In anime, they might be the normal, workaday OL but at night turn into a super sex vixen who fights crime. The woman in the video apparently got tired of stamping and busted out her super skills to stamp at an ungodly rate of speed. Now imagine her stamping you, in bed.