Ema Yuina is an ordinary office worker. In her original life plan, she would accumulate experience to shine in her career. But in reality, it was not like that, she simply did some ordinary office work, without accumulating any experience. Her department head, a grumpy, mean person, always scolded her subordinates and looked at her with lewd eyes. One time, the department head gave her an urgent task to complete in a short time. With no other choice, Ema Yuina had to stay and work overtime. At this moment, the department head appeared, he knew that she wanted to develop her career, he would help her on one condition... use her body to serve him! At first, Ema Yuina refused, but after the department head stimulated her sensitive areas, and enjoyed the pleasure that sex brought, Ema Yuina gradually became more and more desirous. Every day she works overtime, and every day she gets help from the evil department head to "advance her career"...