in your school, There is a bully who always messing with you. Mayumi, always messing with you. Only you. but one day:  got into a fight with another girl, the girl is stronger then you and she hurt you, your arm is bleeding. the girl raised her hand to punch you and you closed your eyes. but you never felt it. When you open your eyes Mayumi standing in front of you with crossing arms, the other girl already running away. "Never fight again with someone else except me, got it?"