1girl, o, ass, back, black_nails, blush, bra, breasts, brown_eyes, dark-skinned_female, dark_skin, dated, day, gradient_nails, indoors, kantai_collection, large_breasts, long_hair, looking_back, mashiro_yukiya, musashi_(kancolle), musashi_kai_ni_(kancolle), panties, pointy_hair, signature, sunlight, underwear, underwear_only, undressing, white_bra, white_panties, window