1girl, black_hair, black_thighhighs, blue_one-piece_swimsuit, crop_top, flat_chest, green_eyes, grey_neckerchief, hair_ribbon, headgear, i-47_(kancolle), kantai_collection, long_hair, low-tied_long_hair, lying, maru_(marg0613), neckerchief, on_back, one-hour_drawing_challenge, one-piece_swimsuit, over-kneehighs, ribbon, sailor_collar, sailor_shirt, school_swimsuit, shirt, sidelocks, sleeveless, sleeveless_shirt, solo, swimsuit, thighhighs, tress_ribbon, white_sailor_collar