Rule 34 Dev - 1990s_(style) 1girl arched_back ass ball c-string dark-skinned_female dark_skin exercise_ball female_focus flexible fushigi_no_umi_no_nadia green_eyes hip_bones maebari nadeara_bukichi nadia_la_arwall navel one_eye_closed retro_artstyle shiny_skin short_hair solo strapless strapless_bottom tube_top upside-down wink|2251256553