Song thế giới chỉ có hai màu trắng đen. 【ĐÃ XIN PER】 Original fiction: https://archiveofourown.org/works/11616123 Original fanart: http://www.pixiv.net/member_illust.php?mode=medium&illust_id=64475816 If you're the author of this fic or the artist of the artwork and dont want me to translate it or use it, please let me know.