A female student, Erina, often goes to her father's construction company to help out. She actually had a different purpose for Erina. Contrary to Erina's appearance, she 'likes old men', and she was happy to follow the workers with her eyes. One day, Erina picks up her work clothes and smells her. In addition, she picks up an electric massager that she can see and she indulges in masturbation. She was spotted by a worker who came back to see her...
