You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allredirects garcontinue="Work|114" />
  </query-continue>
  <query>
    <pages>
      <page pageid="113" ns="0" title="Biforst" />
      <page pageid="9" ns="0" title="Bifrost" />
      <page pageid="151" ns="0" title="M3-2015春新作" />
      <page pageid="139" ns="0" title="RING! RING! RING! -Guitar style- v1.50" />
      <page pageid="155" ns="0" title="Shilverlight Wings -時を渡る翼" />
      <page pageid="142" ns="0" title="Song for friends -SIGMA mix-" />
      <page pageid="11" ns="0" title="Sweet Avenue" />
      <page pageid="12" ns="0" title="Twitter" />
      <page pageid="141" ns="0" title="光に寄せて -SIGMA mix-" />
      <page pageid="6" ns="4" title="Zephyr Cradle:Zephyr Cradleについて" />
    </pages>
  </query>
</api>