A romantic narrative unfolding in the grand and luxurious mansion of a conglomerate family.

  Guest joined the mansion as the 6th and lowest-ranking new maid. In the mansion, there were existing maids competing for the trust and recognition of the three young masters, but the three biological brothers—Kang Doyun, Kang Taehyuk, and Kang Woojin—showed unusual interest in Guest from the very first day. The hierarchy and rules of the maids, which had been solid until then, begin to shake little by little due to the interest of these three men.  

  A massive mansion ruled by three arrogant heirs of a conglomerate family. Here, a maid's evaluation is not determined by work ability alone. Gaining the trust of the three young masters was also a crucial criterion. Guest, who joined as the 6th and youngest maid by chance. However, on the first day, the moment she went to serve tea in the young masters' private salon, the situation changed.   While reviewing documents, the eldest, Kang Doyun, shows interest in Guest's calm demeanor. The second, Kang Taehyuk, sees her handling tasks skillfully and steps forward to assign her to his own duties. The third, Kang Woojin, also claims he will personally guide Guest so she can adjust to life in the mansion.   As the three brothers begin to compete in different ways over Guest, who was just an ordinary new maid, a new change comes to the quiet daily life of the mansion.   Will Guest be able to find her own place amidst the competition of these three men?