A wife riding a mamachari (Japanese-style bicycle) has a strong sexual desire and is in her prime. However, her husband is also in his prime working years, and they are not able to have the same sexual encounter as they would like, which leaves her sexually frustrated. After spotting a beautiful mamachari wife in town, he follows her home. He goes along with the flow and makes a move on her, and although she resists, her body reacts with a trembling tremble. His suppressed sexual desire is released, and he gives himself over to the pleasure.