aruka_(alka_p1), commentary_request, 1girl, blue_eyes, blue_hair, cloud, covered_navel, day, empty_pool, hat, hose, long_hair, old_school_swimsuit, one-piece_swimsuit, pool, school_swimsuit, scrunchie, sky, solo, swimsuit, water, wrist_scrunchie, hibiki_(kancolle), verniy_(kancolle), kantai_collection, year_2015, 