izumi sai, highres, official art, 1girl, black skirt, blue eyes, blue shirt, blunt bangs, blush, breasts, character name, closed mouth, coat, collarbone, dated, english text, hair ornament, happy birthday, jingai kyoshitsu no ningen girai kyoshi, long hair, long sidelocks, long sleeves, looking at viewer, medium breasts, open clothes, open coat, polka dot, polka dot background, saotome yuki, shirt, sidelocks, skirt, smile, solo, standing, tareme, upper body, very long hair, white coat, white hair, x hair ornament