Masato, who grew up in a single-parent household, began to have feelings of love and admiration for his friend's mother, Yuri... Masato, unable to control these feelings, was unable to talk to anyone, and finally turned to his beloved for advice. Yuri taught him how to masturbate, telling him not to tell anyone, since he had no sexual knowledge at all... Unable to control his reason at the pleasure he felt for the first time, Masato pushed Yuri down. Her body, which had not been connected to her husband for a long time, climaxed again and again as his desperate thrusts dug into her vaginal walls...