https://doujinblog.org/230323%e3%82%b5%e3%83%bc%e3%82%af%e3%83%ab%e9%ab%98%e5%b1%8b-%e3%82%a8%e3%83%8d%e3%83%ab%e3%82%ae%e3%83%bc%e7%af%80%e7%b4%84%e7%86%b1%e6%b0%97%e7%90%83-if-%e3%83%89%e3%83%a9%e3%81%88%e3%82%82/