The wife of the Yukimi financial conglomerate, Sayumi, and Reona, the daughter of the Kanzaki family who have served the Yukimi family for generations. The head of the Yukimi family, Kouzou, provided them with a life without any hardships, and both Sayumi and Reona were savoring their happiness. One day, after such a life had continued for some time, Reona was strictly ordered by Kouzou to deliver tribute to a man named Kagamiya, and the two of them visited a certain mansion… There, they heard an appalling truth from Kagamiya's mouth. In a situation where they couldn't escape, Reona resolved in her heart to protect Sayumi…
