(Hikaru X OC) All's fair in love and war

Misaka Onyoa was a 16 year old second head student at Ouran Highschool. She wasn't shy, she was beautiful, she wasn't planning on being a wife so soon, she was getting married.
To Hikaru Hitachiin, heir to the Hitachiin Fashion Line. Neither of them want this, but they don't have a choice. It's for the company. If the Onyoa company and Hitachiin company, both fashion, joined together, the businesses would be unstoppable. Hikaru plans on destroying the marriage, making it impossible, while Misaka knew this would happen someday. Her goal is to make sure he succeeds, unless it would destroy everything both families worked for. But what happens when he falls in love? With her sister?

(Just kidding he falls in love with Misaka)