Satou Sayuri takes on the job as the new front desk worker at the Sparrow's Hotel — the closest hotel to Heaven. Her special features include an outgoing cheerful personality, her busty chest, and her assassination skills. She easily takes down people who cause trouble in the business hotel, but she is in fact very unskilled when talking to the male hotel manager, Shiokawa — who is actually Shiokawa Tamaki's older brother — and often bites her tongue.