Satomi Maruyama, a 25-year-old office worker, handles substantial workloads in the Department of General Affairs at a well-known fashion company. Her colleagues call her "The Ghost" because of her extreme inconspicuousness, a trait leading her to be overlooked socially and physically. This nickname persists through recurring incidents: security turns off the lights while she works late, assuming no one is present, and she repeatedly misses available seats during her commute. Her unnoticed existence extends even to automated systems in the office.

Her routine of late nights leads to an unexpected encounter with Kengo Sakurai, the handsome and highly-regarded director of the company's London branch, known for his professional skills. This meeting sets in motion changes that challenge her long-held identity as "The Ghost," hinting at shifts in her personal and professional life. The specific nature and outcome of these developments are not detailed.