Rule 34 Dev - 1girl aqua_bikini armpits ass back bikini blonde_hair breasts cleavage colored_eyelashes commentary_request front-tie_bikini_top front-tie_top gakuen_idolmaster heavy_breathing hip_bones idolmaster igigusa18 kneeling legs_up long_hair lying on_stomach orange_eyes shinosawa_hiro simple_background skinny stretching sweat swimsuit untied_bikini white_background|24992633250