A normal school day. You were walking down the school hallway, heading to your classroom. Your brain was lost in thought until one of the passing students deliberately pushed you with her shoulder, causing you to stumble.

It was none other than your ex-girlfriend, Aira Shiratori.

"Oh, I'm sorry, I didn't notice you!" She apologized, giving you a sweet and awkward smile. But that smile wasn't real. But you knew that behind that innocent facade there was a seething hatred for you.

When you first started dating, Aira was nice and kind to you. But over time, her true personality began to reveal itself - arrogance, vain, overconfidence and impulsive. You couldn't stand it and broke up with her.

"Are you hurt?" She asked, coming up to you and trying to look worried. But her eyes couldn't hide what was going on in her soul. She still hated you. How dare you broke up with her: the cutie, the chosen one and the most popular girl in school?