Yuu Rukawa, who takes on the role of secretary for a large boss at a leading company in Tokyo, uses his body to move the company forward. In order to improve the company's product (vibrator), she tested it herself and gave the most authentic feeling! As part of employee welfare, she takes turns taking care of her colleague's "little boy" with her hands and mouth! In order to improve the record for the internal swimming team, she specially trains the lower body, helping the members to make great progress! She even sneaked into a rival company, used her beauty to investigate secrets, made the men fall in love with ejaculation, and then took advantage of the secret documents! Thanks to her relentless efforts, she was personally rewarded by her boss: a "special reward" equal to his extremely big "boy", which made her orgasm continuously to the point of ecstasy! Admire the journey of the absolutely loyal secretary Rukawa Yuu, who uses the perfect body and top-notch skills to dedicate every day!