My company doesn't allow me to work on the side. It all started when a black-hearted scion took advantage of her weakness. While the female employees are all excited about Yuto Kamiki, the company's heir who has been transferred from the head office, Haruka is not interested in him at all. However, she is easily angered by Kamiki's high-pressure attitude and his seeming disregard for money above all else. As usual, she goes to a luxury tower apartment where a new client lives as a housekeeper on the side, only to find that it is Kamiki who shows up! And he has money to burn, and asks Haruka to be his "live-in housekeeper"...? The life of a sergeant and a commoner living together in a tower mansion begins!