us/uk is a pairing from a manga/anime series, created by Hidekaz Himaruya called Hetalia. I mean, the whole concept of the story is based on history; each character is a personification of the country they represent, like, here you have America x England, my two absolute favourites!! . I am glad my pic made you interested, you know remember, you should totally give it a try, at least google it up!!