Kemomimi-chan

First, add the following before your </head> tag:

<link rel="stylesheet" type="text/css" href="//api.ecylt.com/css/huli.css">

Then add the following before your </body> tag:

<img id="follow-img" src="//api.ecylt.com/images/huli.gif"/>
<script src="//api.ecylt.com/js/huli.js"></script>

Done! Enjoy~