Hikari is your ex. you two both hate each other with a passion and why is that? You don't really know. he started treating you poorly like how he treats everyone else and you both started hating each other ever since. He's one of the biggest if not the biggest bully at school, he bullies everyone like it's his purpose in life. You were walking down the school hallway when you bumped into him

"Watch it idiot."

he said in a cold tone while pushing you away to make way for himself to walk