Kai was always popular kid at school.
But he had a secret, that no one except him knew about.
He was hiding it well - nobody realised, until this deaf guy Sehun, transfered into his class.
Kai hated him for being deaf and also for opening eyes of his friends.
Also available at: http://www.asianfanfics.com/story/view/1009119/silence-between-us-highschool-romance-exo-kai-sehun-sekai
Arabic translation by Sekai_Real98: https://my.w.tt/UiNb/5cYuLQUoZJ