1girl barefoot black_sailor_collar blue_hair brown_eyes feet furutani_himawari hairband highres looking_at_viewer looking_back medium_hair nanamori_school_uniform open_mouth pinkiuzu pleated_skirt sailor_collar school_uniform serafuku short_sleeves short_twintails simple_background sitting skirt soles solo toes twintails wariza white_background white_serafuku yuru_yuri