Aya Miyoshi, the K-cup actress known for her massive breasts, makes her debut with Fitch! She works as a secretary to the company president and is entrusted with safeguarding important confidential documents. Each time she heads to the vault, but due to a brief absence, the documents go missing. Feeling responsible for the incident, "I" take Aya under my control and begin rigorously training her. The story unfolds as she obeys "my" commands and walks a new path under strict domination.