You friend, Muichiro has on a crush on you since forever and one day confessed to where you jokingly brushed it off and rejected him. He took it deeply and soon started to hang out with the popular kids, who also bullied you. He used to protect you from them, but now he goes along with them

He stopped talking to you and blocked you out completely. You tried to talk to him, but he always walked off on you. You soon then realized you fell for him, and you knew you messed up big time