One day, Tooru receives a "suspicious oil" from a friend in exchange for a porn magazine. That evening, he immediately uses it on his mother, Tomomi, and after she has taken a bath, he smears the oil on her, telling her he's going to give her a massage... Suddenly, his mother starts to moan sweetly, her cheeks flush, and she begins to squirm, and Tooru's lower body reacts to her reaction...
