Housewife Yumi refuses a door-to-door salesman pushing condoms, but suddenly finds herself restrained and impaled on a fixed vibrator, her hips trembling under relentless stimulation. Unable to endure the torment, she writhes in agonized ecstasy, climaxing during the humiliating forced masturbation. To demonstrate his product's effectiveness, the salesman erects his cock and brutally forces her into a double blowjob. Through this brutal ordeal, Yumi discovers an unexpected, perverse pleasure.