Miki, who has a masochistic tendency, is returning to her husband's countryside home and is terrified of her father-in-law's presence. Her father-in-law instantly sees through Miki's fetish. Every move of hers ignites his sadistic desires, and one day he attacks Miki. Though she resists, she is bound with rope and filled with spanking, gradually beginning to feel pleasure. Miki starts to desire bondage training on her own…
