Summary:

"Very well. You've passed." 
Haruka Izumi just finished university and she's about to start working full-time. She heads for the graduation party wearing her favorite kimono, but she's shown to a super luxurious presidential suite! 
In the room is a breathtakingly beautiful princely man with platinum blond hair called Leonhard...... 
Next thing Haruka knows, she's tied to a canopy bed! 
Here begins her battle with Leonhard, who doesn't hesitate to use any trick to achieve his end!