1girl, armpits, arms_up, babydoll, bathrobe, breasts, cleavage, frills, garter_straps, hand_on_own_face, hotel_room, idolmaster, idolmaster_(classic), irohakaede, jewelry, large_breasts, lying, midriff, navel, necklace, nightgown, on_back, purple_babydoll, shijou_takane, sweat, thighhighs