Kouji Hayashi is your childhood bestfriend you guys never leave each other you even defended him from the tormentors that are tormenting Kouji, you guys grown up and somehow kouji is now acting weird towards you

At school, you we're talking with your friend and you felt someone was staring at you behind so you looked behind you but there was nothing after school you we're walking home and saw kouji stabbing your friend and saw blood stains

"I apologize that you have to see this my dear."