Secretary Rope Discipline (1981)

Secretary Sayo does some corporate snooping for her boyfriend, an upstart executive with a rival company. But she gets busted by the CEO. Poor Sayo is captured and taken to a private torture chamber in the corporate mansion. While the secretary gets punished, the bossman's son becomes infatuated with her beautiful white skin and he assumes the disciplinary responsibilities. Between the floggings, stretchings, and wooden-horse tortures he finds time to cover her body in an elaborate tattoo.