Innocent schoolgirl Kana was sent by her father to help out at his construction company, where she was doted on by the workers. However, what they didn't know was that beneath her cute exterior, Kana harbored a secret desire for older men. One day while exploring the workshop, she discovered an electric massager and couldn't resist giving herself pleasure using it. Unbeknownst to her, one of the workers had witnessed her act and became aroused. Before long, he and several others pinned her down, eager to satisfy their desires!