As a sex addict who always watches black magazines and movies on the internet but is always curious about it because he has never practiced it before, the opportunity came to the young man when the father brought his lewd stepmother Hoshino to debut with him. When they first met, the two seemed to have dark thoughts in their heads and then the days when dad was away were also the time when many sneaky things happened. The son is a teenager, so he is very interested in new things, especially sex, so he has many times peeked at his stepmother bathing and even had a perverted expression like smelling her underwear. The thirst and desire reached its peak when he was masturbating, she went to the room to clean her clothes, and she couldn't stand the heat, so the spoiled child seduced her stepmother, but because she had a preconceived idea, she couldn't refuse such a good opportunity.