https://doujinblog.org/191220-clockup-%e5%81%a5%e5%85%a8%ef%bc%81%e5%a4%89%e6%85%8b%e5%85%ac%e5%83%95%e3%81%ae%e3%83%84%e3%83%88%e3%83%a1-update-1-01-serial/