1girl absurdres all_fours ass bench black_buruma black_socks blue_jacket brown_hair buruma day feet_out_of_frame from_behind grass headband highres idolmaster idolmaster_shiny_colors jacket kneehighs long_hair long_sleeves looking_at_viewer looking_back osaki_tenka outdoors parted_lips ponytail sidelocks socks thermos towel track_jacket wanimaru yellow_eyes