Umeko is plain, has no experience with romance, and is working a desk job when she sees her first love again. Saiou Tonoshiro worked for her family when she was young, and now he's come back to be their butler. However, her relatives are pushing her into an arranged marriage and making her undergo "bride training" so she can please her future husband! On top of that, the people in charge of unleashing her wild side are Saiou and a group of handsome servants! Her body begins to crave more by the day...!