1girl, solo, long hair, looking at viewer, skirt, black hair, thighhighs, school uniform, standing, grey eyes, full body, ponytail, pleated skirt, shoes, serafuku, black thighhighs, indoors, sailor collar, zettai ryouiki, neckerchief, window, blood, desk, classroom, school desk, blood on clothes, chalkboard, blood splatter, blood on weapon, school, hallway, blood stain