Since he was young, Masato, who grew up in a single-parent household with his father, had developed feelings for his friend's mother, Yuri. Unable to confide in anyone about these feelings, Masato eventually consulted her. With no knowledge of sex, Yuri told him 'keep it a secret' and taught him how to masturbate... Overwhelmed by the new sensation, Masato couldn't control himself and pushed Yuri down. Her body, long untouched by her husband, reached climax multiple times under his frantic thrusts.
