I created this script to simplify data-export from NozomiLa

nozomi_data_exporter.user.js

// ==UserScript==
// @name         Nozomi Exporter
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Exporting posts from NL
// @author       Nuark
// @match        https://nozomi.la/
// @match        https://nozomi.la/tag/*
// @grant        none
// @run-at       document-end
// ==/UserScript==

(function() {
    'use strict';

    window.dataholder = {
        init: function(max_c) {
            this.container = [];
            this.max_c = max_c;
        },
        addData: function(data) {
            this.container.push(data);
            console.log(`Dispatched item insertion. ${this.container.length} of this.max_c...`);
            if (this.container.length >= this.max_c) {
                console.log("Work done. Serializing...");
                let jtext = JSON.stringify(this.container);
                console.log(this.container);
                let winop = window.open("about:blank", "_blank");
                winop.document.write('<textarea style="width:80vw;height:90vh">' + jtext + "</textarea>");
                winop.blur();
                window.focus();
            }
        }
    }

    window.switch_selection = function (elem) {
        let clicked = elem.dataset.checked === "true";
        elem.dataset.checked = !clicked;
        return elem;
    }

    window.btn_enabler = function (e) {
        e.preventDefault();
        let target = e.target;
        while (!target.classList.contains("thumbnail-div")) {
            target = target.parentNode;
        }
        window.switch_selection(target);
    }

    window.export_tags = function(sidebar) {
        let out = "";
        let tags = sidebar.querySelectorAll("ul > li > a");
        tags.forEach(x => {
            if (x.classList.toString() !== "tag") out += x.classList.toString() + ":";
            out += x.innerText.replace(/ /g, "_") + " ";
        });
        out = out.trim();
        return out;
    }

    window.zxc = function() {
        let targets = document.querySelectorAll("[data-checked=true]");
        window.dataholder.init(targets.length);
        targets.forEach(dct => {
            let href = dct.querySelector("a").href;
            fetch(href).then(r => r.text()).then(text => {
                console.log("Executing order for " + href);
                let holder = document.createElement("div");
                holder.innerHTML = text;
                [...holder.querySelectorAll("script"), ...holder.querySelectorAll("link")].forEach(scr => scr.remove())
                let sidebar = holder.querySelector("div.sidebar");
                let tags = window.export_tags(sidebar);
                let img_href = holder.querySelector(".post > a").href;
                window.dataholder.addData({href: img_href, tags:tags});
                window.switch_selection(dct);
            });
        });
    }

    let init = function() {
        if (document.querySelectorAll(".thumbnail-div").length === 0) {
            setTimeout(init, 1000);
            return;
        }
        let button = document.createElement("button");
        button.innerText = "EXECUTE ORDER";
        button.style = "width: 100%;";
        button.onclick = window.zxc;
        let sidebar = document.querySelector("div.sidebar");
        sidebar.prepend(button);

        let s = document.createElement("style");
        s.innerText = "[data-checked=true] { outline: greenyellow 3px dashed; }";
        document.head.appendChild(s);

        document.querySelectorAll(".thumbnail-div").forEach(tdiv => {
            tdiv.onclick = window.btn_enabler;
        });
    }

    init();
})();