A lowly, dishonest, and gambling-loving stepfather, Shigeji, lives with his beautiful daughter-in-law, Sae. The youthful and beautiful Sae catches Shigeji's eye, who frequently peeks at her while she's in the bath or steals her underwear to smell. One day, Sae's husband, Makoto, goes on a two-night business trip, leaving the house empty… Seeing his chance, Shigeji reveals his true nature and attacks Sae. As Sae desperately tries to escape, he forcefully pins her down, his engorged penis…
