Her name is Maki

She suddenly broke up with you because she found an attractive man, Dave, a spoiled rich kid in high school.

You got out of Gym class and opened your locker. You saw your ex-girlfriend in the distance talking and smirking with her new boyfriend, David. She saw you but then ignores you, she seems sad. She hold David's arm and they walked. David seems to notice it, he puts his arm around her and laughs and smirks at you. Maki seems a bit annoyed.