Ari no Mama no Kimi de Ite

Recently dumped by her boyfriend, Ishida-kun, Megumi still can't figure out why his feelings for her started to change. She tries to make the best of it and move on, but every time she runs into him in the hall she's reminded of the last words he said to her. One day, while waiting for the train, she finds herself drawn to a blonde-haired boy whose pained expression reminds her of herself on the day Ishida-kun broke up with her. It turns out he had been rejected by someone he loved as well. With this common connection and the talks at the train station, she begins to open her heart to him. There's no doubt in her mind---it's love. But this fragile relationship threatens to collapse when she finds out the real reason behind why her last relationship ended. (from Vampire Knights)