Erina, a female student, often goes to help her father at the construction shop he runs. - Actually, Erina had another purpose. - Contrary to her appearance, Erina ``likes old men'' and takes pleasure in following the workers with her eyes. - One day, in the construction shop, Erina picked up some work clothes and smelled them. - Furthermore, he picks up an electric massager that he sees and indulges in masturbation. - This was witnessed by a worker returning home...