Rule 34 Dev - 1girl adjusting_hair arms_behind_head arms_up bad_id bad_pixiv_id black_socks blush breasts hair_tie kneehighs long_sleeves mikakunin_de_shinkoukei mouth_hold pink_hair purple_eyes rubberband sailor_collar school_uniform serafuku shibasaki_shouji short_hair simple_background sitting skirt socks solo tying_hair yonomori_kobeni|5421365703