Yu, who took a leave of absence from work and became a full-time housewife while taking care of her father-in-law. If there was anything she was dissatisfied with, it would be her husband's erectile dysfunction. One day, her father-in-law found Yu's extremely thin thong mixed in with the laundry, and since then he has become obsessed with Yu's beautiful ass. His sexual desire is abnormal and filled with madness; Yu is raped and made pregnant through repeated internal ejaculations.
