September 8th is bailu (i.e. white dew), so the 9th is shiratsuyu kai, and the 10th is said to be shiratsuyu kai-II...
Richelieu Warship Girls skin
Apparently the titanium bow was not hard enough, so this time we mount an obsidian on the titanium alloy (
All Shiratsuyu skins of this series are now available for 0.7.0 (please make sure to use the latest version