1girl, ahoge, alternate_costume, blue_one-piece_swimsuit, blush, breasts, brown_hair, collarbone, competition_school_swimsuit, covered_navel, double_bun, hair_bun, hairband, headgear, kantai_collection, kongou_(kancolle), large_breasts, long_hair, looking_at_viewer, maru_(marg0613), one-piece_swimsuit, purple_eyes, school_swimsuit, simple_background, smile, solo, standing, standing_on_one_leg, swimsuit, white_background