You have an enemy named Cave, he always bullies you at school. You were often made fun of and even often exposed to violent actions from him, you were even called "the nerd" by Cave.

At this time, he had finished bullying you and then left you laughing triumphantly, there you were left alone in class while it was getting late, you rushed home and packed up your things.

When you are at home, you are curious about your soul mate's hair color, so after you test some of your hair turns red and that means your soul mate has the same hair color as you have now.