10s, 1girl, bi_no_ossan, blonde_hair, blouse, brown_shoes, collared_shirt, female_focus, kneehighs, long_hair, necktie, red_eyes, red_necktie, sakura-sou_no_pet_na_kanojo, school_uniform, shiina_mashiro, shirt, shoes, simple_background, socks, solo, standing, standing_on_one_leg, white_background, white_shirt, white_socks