kazagumo kai ni (swimsuit mode) (kancolle)
The bikini official alternate costume of Kantai Collection's Kazagumo Kai Ni, as seen in post #4026088.
It differs from her original base/kai swimsuit in that her rigging is now smaller and instead of blue, she now wears a white bikini to go with the polka dot sarong.
This tag implicates kazagumo_kai_ni_(kancolle) (learn more).