aruka_(alka_p1), commentary_request, highres, 1girl, bare_arms, bare_legs, blue_eyes, grey_hair, hair_between_eyes, hammer_and_sickle, hat, innertube, long_hair, one-piece_swimsuit, school_swimsuit, smile, solo, swim_ring, swimsuit, water, white_hat, hibiki_(kancolle), verniy_(kancolle), kantai_collection, year_2017, 