1girl, blush, bow, bow_bra, bow_panties, bra, breasts, clenched_hand, closed_mouth, frilled_bra, frilled_panties, frills, frown, grey_background, idolmaster, idolmaster_cinderella_girls, loli, long_hair, looking_at_viewer, lying, monochrome, navel, on_side, panties, simple_background, small_breasts, solo, spread_legs, tachibana_arisu, torotei, underwear, underwear_only