body,
div#container,
div#wiki-container {
    background:transparent;
}
body {
	background-image:url('https://image01.seesaawiki.jp/m/g/minnade-oudou-rpg/8860d491fb0afd5ca7b2.PNG');
	background-repeat:no-repeat;
	background-position:50% 0;
	background-color:transparent;
}