conte di cavour (swimsuit mode) (kancolle)
The bikini official alternate costume of Kantai Collection's Conte di Cavour, as seen in post #5010699. While considered an official costume, it has remained unreleased in the game apart from the 2022 calendar.
It consists of a plain black side-tie bikini.
See also
This tag implicates conte_di_cavour_(kancolle) (learn more).