Femme fatale Marie Mamiya reigns supreme over corporate Japan as the head of the powerful Mamiya Group. When Yukio applies as a fitness instructor at the ultra-exclusive Royal Family Fitness Club—run by the Mamiya Group and Sugimoto Pharmaceuticals—he is shocked to find himself hired as her personal trainer, beating out an entire room of muscled adonises despite his average build. Little does he know she’ll whip him into shape soon enough... all in the name of beauty!