ma.js

// ==UserScript==
// @name       Auto Accept △ Complex
// @namespace  https://github.com/tatzyr/
// @version    0.1.0
// @description  Auto Accept △ Complex
// @include    https://www.sankakucomplex.com/mature-content-disclaimer/*
// @match      https://www.sankakucomplex.com/mature-content-disclaimer/*
// @run-at     document-end
// @copyright  2018, Tatzyr
// ==/UserScript==

(function() {
    function clickYes(doc) {
        const link = doc.querySelector('#primary > div > div.main-box-inside > p > a:nth-child(2)');
        link.click();
    }

	clickYes(document);
}());