Rena Munakata, a 27-year-old beauty-industry CEO, is stressed by business trouble and sexually frustrated after a long dry spell. Her secret pleasure is making men squirm, so she hires a popular traveling masseuse at an inn—only to discover he is Shirata, a former university superior. She pushes him onto the bedding, straddles him, and tries to milk him dry. But Shirata knows every sensitive spot and fights back, reversing their roles in the outdoor bath. They spend the rest of the night having sex and bringing each other to orgasm again and again, revealing Rena’s dominant side and her hidden desire to submit to someone she trusts.