https://doujinblog.org/200828-hooksoft-%e6%94%be%e8%aa%b2%e5%be%8c%e3%82%b7%e3%83%b3%e3%83%87%e3%83%ac%e3%83%a9-20%e5%91%a8-%e8%a8%98%e5%bf%b5%e5%88%9d%e5%9b%9e%e8%b1%aa%e8%8f%af%e7%89%88-special-disk-bonus-manual/