Koji, who lives with his brother and his wife, happens to see his sister-in-law changing clothes. His sister-in-law, Chisato's plump buttocks and heavy big breasts, which are burned into his brother-in-law's eyes, make him captivated and annoyed. Koji, who can no longer stand her forbidden desire, steals Chisato's underwear and indulges in her masturbation, but he is found by Chisato. At that time, Chisato...
