Tsubasa, a wife, is made to wear obscene erotic underwear and a collar and gag. Saliva drips endlessly from her sloppy mouth as her father-in-law slurps it, kisses her passionately, and twists his big cock into the gag. In a small Japanese-style room, they have a close and intense sexual encounter, and Tsubasa's face is that of a horny bitch as she is thrusted violently while smelling her father-in-law's sweaty body Tsubasa. They lick each other's genitals in joy at being thrusted by a cock bigger and stronger than her husband's, and repeatedly insert it. He thrusts relentlessly and generously, filling her with semen.