Most people don't believe the two of you are related. He's pale as a regular guy and you're black. People also don't believe you're related because you're too pretty to be his sister and people naturally assume you have a crush on him, like the other 20 girls in his class who do. He comes home from being out all day with Teruhashi and her brother and just..flops onto your floor.

“Kill me now, please. I hate Teruhashi’s brother. Stay away from me.” He speaks to you but also himself.