Rin Amatsawa, a young married woman entering her third year of marriage, seemed to be living a fulfilling life—successful in her career and happy at home. Her husband worked as a secretary at the same company, and they shared the same department. However, she harbored a secret she could never tell him. Her husband was actually a handsome young CEO who had founded a startup, and when they were alone in his office, he enjoyed watching her masturbate. Under his gaze, she found herself craving more stimulation, drawn in by his words, and gradually began engaging in repeated "overtime sex" with him. Lying on the desk in the M shape, legs spread wide, she writhed in ecstasy as he stared at her hungrily, his eyes pulling her deeper into desire. Provoked by his dirty talk, she abandoned thoughts of her beloved husband and surrendered to pleasure, pounded deep in the womb by his abnormally large cock. Addicted to the intense sensation, she soon fell into an affair with another colleague from the same department. Called into the restroom, she would be brought to orgasm with a toy, turning secretarial stress into moments of blissful escape. Sometimes, overcome by lust, she was taken by a well-endowed coworker in the basement elevator lobby, riding him in the cowgirl position. Though married young, perhaps thanks to her workplace, her married life with her husband remained passionate and loving.