1girl, :o, amagami, armpits, arms up, bed sheet, bikini, black hair, breasts, breasts apart, cushion, frilled bikini, frills, front-tie bikini top, front-tie top, looking at viewer, lying, messy hair, navel, on back, small breasts, solo, stomach, swimsuit, tanamachi kaoru, thighs, upside-down, usurai rairai