Add a DLsite link to HVDB works.
// ==UserScript==
// @name HVDB-DLSITE-LINK
// @author Paw
// @icon http://hvdb.me/favicon.ico
// @namespace http://tampermonkey.net/
// @version 1.4
// @description Add a DLsite link to HVDB works.
// @author You
// @match http://hvdb.me/Dashboard/WorkDetails/*
// @match http://hvdb.me/Dashboard/Details/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
var p = document.createElement("p");
p.innerHTML="<br/>";
var a = document.createElement("a");
p.appendChild(a);
var t = document.querySelector("div.body-content h2").innerHTML;
var w = t.split("-").pop().trim();
a.href = "https://dereferer.me/?https://www.dlsite.com/maniax/work/=/product_id/" + w;
a.target = "_blank";
var img = document.createElement("img");
img.src = "https://i.imgur.com/LD1WguE.jpg"; // https://www.dlsite.com/img/dlsite1.gif
a.appendChild(img);
var x = document.querySelector(".container-fluid img.detailImage");
x.parentNode.insertBefore(p, x.nextSibling);
})();