After her husband Keigo became bedridden due to an accident, making it difficult for her to continue working, the beautiful daughter-in-law Saya moved in with her father-in-law Shigetsugu. Forced by financial circumstances to live under the same roof, Saya gradually begins to recognize Shigetsugu's true nature. Using selfish reasoning such as "With Keigo bedridden, you must be sexually frustrated," Shigetsugu starts pressuring her. He ties her up with coarse rope and brutally forces his erect penis into her, leading to a cruel and relentless assault. A shocking narrative unfolds as Saya's suffering collides with Shigetsugu's vile desires.