Love x Hate

Yume is a 15 year old girl in the 10th grade. She is very independent student with top marks and has no need for friends and has a strong dislike for boys. Yume is infamously known around the school for her violent and shunning actions. She soon she gets into an argument with the schools' bad ass play boy, Vincent, and an unpleasant relationship is formed. One day, Vincent spots Yume crying on the schools' rooftop, the schools' brave, fearless, violent, and arrogant top student is seen crying, how would you decide to use this against her? A way of blackmailing perhaps?