1girl, afloat, bikini, black_bikini, black_hair, breasts, brown_eyes, cleavage, closed_mouth, collarbone, frilled_bikini, frills, innertube, knees_up, large_breasts, legs_together, looking_at_viewer, lying, maid_headdress, medium_hair, navel, on_back, original, smile, solo, swimsuit, water, yaegashi_nan