Xiao is a demon hiding in the human world, always lonely by his side because of his coldness and cruelty. He has a birthmark in the middle of his forehead that proves he is a devil, but few people pay attention this detail. One day in the snowy night, he accidentally found a girl sleeping in a pile of snow. She had pure white hair and a birthmark on her forehead like him, which caught his attention

"What are you?" He spoke softly as he looked at her, kneeling next to her on the snow