https://doujinblog.org/%e5%90%8c%e4%ba%ba%e9%9f%b3%e5%a3%b0200321purplesoftware-%e3%83%8f%e3%83%94%e3%83%a1%e3%82%a2%e9%9f%b3%e5%a3%b0%e4%bd%9c%e5%93%81-%e6%9c%89%e6%a0%96%e7%b7%a8%e3%80%8c%e3%81%82%e3%81%9f%e3%81%97/