1girl, ass, back, black_eyes, black_hair, blue_one-piece_swimsuit, blue_sailor_collar, blush, feet, from_behind, fubuki_(kancolle), kantai_collection, looking_back, low_ponytail, old_school_swimsuit, one-piece_swimsuit, pink_background, ponytail, sailor_collar, sakieko, school_swimsuit, school_uniform, serafuku, shirt, short_ponytail, short_sleeves, solo, sweatdrop, swimsuit, swimsuit_under_clothes, white_background, white_shirt