Beautiful, shapely Satomi Usui teaches a popular practical course for adult couples who want to end a sexless relationship. She starts by showing how to arouse a woman, rubbing her clit and inserting a vibrator as her pale body writhes. When an adult student takes control of the toy from behind, she screams through repeated orgasms. Sex-starved in her own marriage, Satomi finally loses control, takes two students' huge cocks into her mouth at once, then sucks one while being pounded from behind. The lesson ends with both cocks taking turns deep in her soaked pussy and filling her repeatedly with cum.