1girl, black_one-piece_swimsuit, blue_border, blue_eyes, blue_hair, border, competition_swimsuit, embarrassed, flat_chest, gradient_hair, kantai_collection, long_hair, looking_at_viewer, multicolored_hair, narashika_asuka, one-piece_swimsuit, samidare_(kancolle), solo, swept_bangs, swimsuit, very_long_hair, white_background