1girl, ass, barefoot, bikini, blue_bikini, blue_eyes, blush, breasts, brown_hair, c_(theta), collarbone, feet, feet_up, hand_on_own_cheek, hand_on_own_face, head_rest, idolmaster, idolmaster_million_live!, legs, looking_at_viewer, lying, mat, micro_bikini, multiple_views, on_stomach, outdoors, short_twintails, small_breasts, soles, suou_momoko, swimsuit, the_pose, toes, twintails