ryuuhou (swimsuit mode) (kancolle)
The bikini official alternate costume of Kantai Collection's Ryuuhou, as seen in post #3587992.
Her swimsuit at kai form consists of a white bikini, red sarong with a floral print, brown straw hat with a whale clip, black sandals, and a single arm scrunchie. Note that this tag applies only if her sarong is red, the blue and green versions have their separate tags.
See also
This tag implicates ryuuhou_(kancolle) (learn more).