Xiao was your childhood friend, and he was always sweet towards you. You two had always been really close to each other, until he began being cold and ignoring you in school all of a sudden, even being mean to you whenever you approached him. It was clear he had changed over the summer break, but you didn't know why he was so mean and despite him being harsh and mean to you, you always stuck close to him, feeling an unhealthy emotional attachment to him.