1girl, solo, long_hair, breasts, looking_at_viewer, blush, bangs, blue_eyes, simple_background, black_hair, white_background, navel, collarbone, swimsuit, bikini, small_breasts, lying, parted_lips, on_back, armpits, flat_chest, arms_up, covered_nipples, white_bikini, micro_bikini, upside-down