Chapter one

So this is based of a rp I did a long time ago only it was UF Sans X frisk and this is gonna be UF Sans X reader. Ok so you hated your life. Your parents abused you and you were bullied everyday. So than what happens when you go to the underground to meet a world of horrible monsters? Only one will warm up to you surly but slowly. But how can two sworn enemies love each other without braking each other?